[Docs] Move cloud docs to main docs (#2049)

## Summary

First draft of cloud docs. Collects all the features currently under the
jetify cloud docs, and moves them into the devbox docs

## How was it tested?

Localhost + `npm run build` to check for broken links

---------

Signed-off-by: John Lago <[email protected]>
Co-authored-by: Lucille Hua <[email protected]>

Author: Lagoja

docs/app/docs/cli_reference/devbox_cache.md

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+# devbox cache
+
+A collection of commands to interact with the Jetify Cache or other Nix caches.
+
+```bash
+  devbox cache [command]
+```
+
+## Subcommands
+  info        Output information about the nix cache
+  upload      upload specified or nix packages in current project to cache
+
+## Options
+| Option | Description |
+| --- | --- |
+| `-h, --help` | help for cache |
+| `-q, --quiet` | suppresses logs |

docs/app/docs/cli_reference/devbox_cache_configure.md

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+# devbox cache configure
+
+Configure Nix to use the Devbox cache as a substituter.
+
+If the current Nix installation is multi-user, this command grants the Nix
+daemon access to Devbox caches by making the following changes:
+
+- Adds the current user to Nix's list of trusted users in the system nix.conf.
+- Adds the cache credentials to ~root/.aws/config.
+
+Configuration requires sudo, but only needs to happen once. The changes persist
+across Devbox accounts and organizations.
+
+This command is a no-op for single-user Nix installs that aren't running the
+Nix daemon.
+
+```bash
+  devbox cache configure [flags]
+```
+
+## Options
+
+<!-- Markdown table of options -->
+| Option | Description |
+| --- | --- |
+| `--user string` | The OS user to configure Nix for. Defaults to the current user. |
+| `-h, --help` | help for configure |
+| `-q, --quiet` | suppresses logs |

docs/app/docs/cli_reference/devbox_cache_info.md

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+# devbox cache info
+
+Output information about the nix cache
+
+```bash
+  devbox cache info [flags]
+```
+
+## Options
+<!-- Markdown table of options -->
+| Option | Description |
+| --- | --- |
+| `-h, --help` | help for info |
+| `-q, --quiet` | suppresses logs |

docs/app/docs/cli_reference/devbox_cache_upload.md

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+# devbox cache upload
+
+Upload specified nix installable or nix packages in current project to cache.
+If [installable] is provided, only that installable will be uploaded.
+Otherwise, all packages in the project will be uploaded.
+To upload to specific cache, use --to flag. Otherwise, a cache from
+the cache provider will be used, if available.
+
+```bash
+devbox cache upload [installable] [flags]
+```
+
+## Aliases
+upload, copy
+
+## Options
+
+| Option | Description |
+| --- | --- |
+| `-c, --config string` | path to directory containing a devbox.json config file |
+| `-h, --help` | help for upload |
+| `--to string` | URI of the cache to copy to |
+| `-q, --quiet` | suppresses logs |

docs/app/docs/cli_reference/devbox_secrets.md

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+# devbox secrets
+
+Manage environment variables and secrets
+
+## Synopsis
+
+Manage environment variables and secrets
+
+Securely stores and retrieves environment variables on the cloud.
+Environment variables are always encrypted, which makes it possible to
+store values that contain passwords and other secrets.
+
+```bash
+devbox secrets [flags]
+```
+
+## Options
+
+```bash
+  -h, --help   help for devbox secrets
+```
+
+## SEE ALSO
+
+* [devbox_secrets_download](./devbox_secrets_download.md)  - Download environment variables into the specified file
+* [devbox_secrets_init](./devbox_secrets_init.md)  - initialize directory and devbox secrets project
+* [devbox_secrets_list](./devbox_secrets_list.md)  - List all stored environment variables
+* [devbox_secrets_rm](./devbox_secrets_rm.md)  - Delete one or more environment variables
+* [devbox_secrets_set](./devbox_secrets_set.md)  - Securely store one or more environment variables
+* [devbox_secrets_upload](./devbox_secrets_upload.md)  - Upload variables defined in a .env file

docs/app/docs/cli_reference/devbox_secrets_download.md

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+# devbox secrets download
+
+Download environment variables into the specified file
+
+## Synopsis
+
+Download environment variables stored into the specified file (most commonly a .env file). The format of the file is one NAME=VALUE per line.
+
+```bash
+devbox secrets download <file1> [flags]
+```
+
+## Options
+
+```bash
+      --environment string   Environment name, such as dev or prod (default "dev")
+  -f, --format string        File format: env or json (default "env")
+  -h, --help                 help for download
+      --org-id string        Organization id to namespace secrets by
+      --project-id string    Project id to namespace secrets by
+```
+
+## SEE ALSO
+
+* [devbox_secrets](./devbox_secrets.md)	 - Manage environment variables and secrets
+

docs/app/docs/cli_reference/devbox_secrets_init.md

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+# devbox secrets init
+
+Initialize devbox secrets in the project directory. This setup step creates/connects to an existing jetify cloud project
+
+```bash
+devbox secrets init [flags]
+```
+
+## Options
+
+```bash
+  -h, --help   help for init
+```
+
+## SEE ALSO
+
+* [devbox_secrets](./devbox_secrets.md)  - Manage environment variables and secrets

docs/app/docs/cli_reference/devbox_secrets_list.md

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+# devbox secrets list
+
+List all stored environment variables
+
+## Synopsis
+
+List all stored environment variables. If no environment flag is provided, variables in all environments will be listed.
+
+```bash
+devbox secrets list [flags]
+```
+
+## Options
+
+```bash
+      --environment string   Environment name, such as dev or prod (default "dev")
+  -f, --format string        Display the key values in key=value format (default "table")
+  -h, --help                 help for ls
+      --org-id string        Organization id to namespace secrets by
+      --project-id string    Project id to namespace secrets by
+  -s, --show                 Display the value of each environment variable (secrets included)
+```
+
+## SEE ALSO
+
+* [devbox_secrets](./devbox_secrets.md)  - Manage environment variables and secrets

docs/app/docs/cli_reference/devbox_secrets_rm.md

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+# devbox secrets rm
+
+Delete one or more environment variables
+
+## Synopsis
+
+Delete one or more environment variables that are stored.
+
+```bash
+devbox secrets rm <NAME1> [<NAME2>]... [flags]
+```
+
+## Options
+
+```bash
+      --environment string   Environment name, such as dev or prod (default "dev")
+  -h, --help                 help for rm
+      --org-id string        Organization id to namespace secrets by
+      --project-id string    Project id to namespace secrets by
+```
+
+## SEE ALSO
+
+* [devbox_secrets](./devbox_secrets.md)  - Manage environment variables and secrets

docs/app/docs/cli_reference/devbox_secrets_set.md

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+# devbox secrets set
+
+Securely store one or more environment variables
+
+## Synopsis
+
+Securely store one or more environment variables.
+
+```bash
+devbox secrets set <NAME1>=<value1> [<NAME2>=<value2>]... [flags]
+```
+
+## Options
+
+```bash
+      --environment string   Environment name, such as dev or prod (default "dev")
+  -h, --help                 help for set
+      --org-id string        Organization id to namespace secrets by
+      --project-id string    Project id to namespace secrets by
+```
+
+## SEE ALSO
+
+* [devbox_secrets](./devbox_secrets.md)  - Manage environment variables and secrets