feat(cli): Add interactive prompts for commands (#5170)

This PR improves the CLI's user experience by introducing an interactive
mode for the `create`, `dryrun`, `deploy`, and `init` commands.
​
When a user runs one of these commands without providing all the
required arguments, the CLI will now launch an interactive prompt to
guide them through the missing options. This makes the CLI easier to
use, as it no longer requires users to memorize all command-line
arguments.
​
The interactive prompts are built using `inquirer` to provide a
user-friendly selection list for known values (like function types or
environments).
​
The interactive mode is enabled by default and can be disabled with the
`--no-interactive` flag or by setting the `CI` environment variable,
ensuring backward compatibility and scriptability.
​
 Fixes NAN-4237
​
Testing:
 1. Run `npm install` to add the new `inquirer` dependency.
2. Run `nango create` without any arguments. Verify that you are
prompted to select a function type, integration, and provide a name.
3. Run `nango dryrun` without any arguments. Verify that you are
prompted to select an environment, a function, and a connection.
4. Run `nango deploy` without an environment. Verify that you are
prompted to select one.
5. Run `nango init` without a path. Verify that you are prompted to
enter one.
6. Run any of the above commands with the `--no-interactive` flag to
confirm that the prompts are skipped and the command fails due to
missing arguments.

<!-- Summary by @propel-code-bot -->

---

A shared Ensure utility now orchestrates the interactive prompts,
translating missing-argument errors into actionable guidance while
preserving non-interactive execution when required.

<details>
<summary><strong>Affected Areas</strong></summary>

• packages/cli/lib/index.ts
• packages/cli/lib/services/interactive.service.ts
• packages/cli/lib/services/ensure.service.ts
• packages/cli/lib/services/function-create.service.ts
• packages/cli/lib/types.ts
• packages/cli/lib/services/sdk.ts
• packages/cli/lib/utils/errors.ts
• packages/cli/tsconfig.json
• packages/cli/package.json
• docs/reference/cli.mdx
• package-lock.json

</details>

---
*This summary was automatically generated by @propel-code-bot*

Author: agusayerza

docs/reference/cli.mdx

@@ -53,6 +53,50 @@ Get details about a specific command by running:
 nango [command] --help
 ```
 
+## Interactive Mode
+
+The Nango CLI includes an interactive mode that prompts you for missing arguments. For example, if you run `nango create` without specifying the function type, integration, or name, the CLI will prompt you for them.
+
+This mode is enabled by default when you're in an interactive terminal session.
+
+### Usage Examples
+
+**Interactive Usage:**
+
+If you run a command without all the required arguments, the CLI will prompt you for them.
+
+```bash
+# Running "nango create" without arguments
+$ nango create
+
+? What type of function do you want to create?
+❯   sync
+    action
+    on-event
+```
+
+**Non-Interactive (Explicit) Usage:**
+
+You can provide all arguments upfront to bypass the interactive prompts. This is ideal for scripting.
+
+```bash
+nango create --sync --integration my-api --name get-contacts
+```
+
+### Disabling Interactive Mode
+
+You can disable interactive mode in two ways:
+
+1.  **Using a flag:** Pass the `--no-interactive` flag to any command.
+    ```bash
+    nango create --no-interactive
+    ```
+2.  **In a CI environment:** Interactive mode is automatically disabled when the `CI` environment variable is set. This is the standard way to detect CI/CD environments.
+
+### Backwards Compatibility
+
+Interactive mode is fully backward compatible. If you provide all the required arguments for a command, the CLI will not prompt you for anything and will behave exactly as it did before.
+
 ## Flags & environment variables
 
 Global command flags:
@@ -61,6 +105,9 @@ Global command flags:
 # Command flag to auto-confirm all prompts (useful for CI).
 # Note: Destructive changes (like removing a sync or renaming a model) requires confirmation, even when --auto-confirm is set. To bypass this restriction, the --allow-destructive flag can be passed to nango deploy.
 --auto-confirm
+
+# Command flag to disable interactive mode.
+--no-interactive
 ```
 
 Environment variables:
@@ -85,4 +132,3 @@ NANGO_DEPLOY_AUTO_CONFIRM=false # Default value
 <Tip>
 **Questions, problems, feedback?** Please reach out in the [Slack community](https://nango.dev/slack).
 </Tip>
-