ref: convert documentation from README.rst to GitHub Wiki (#495)

## 📝 Description

**What does this PR do and why is this change necessary?**

All information from the `README.rst` file has been moved to the [Wiki](https://github.com/linode/linode-cli/wiki) adding a simple `README.md` to push people to the Wiki, please leave any feedback about the wiki here as well.

Co-authored-by: Lena Garber <[email protected]>

Author: jriddle-linode

.github/workflows/publish-wiki.yml

@@ -0,0 +1,26 @@
+name: Publish Wiki
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Generate App Installation Token
+      id: generate_token
+      uses: tibdex/github-app-token@b62528385c34dbc9f38e5f4225ac829252d1ea92 # pin@v1
+      with:
+        app_id: ${{ secrets.CLI_RELEASE_APP_ID }}
+        private_key: ${{ secrets.CLI_RELEASE_PRIVATE_KEY }}
+        repository: linode/linode-cli
+
+      - name: Upload Documentation to Wiki
+        uses: SwiftDocOrg/github-wiki-publish-action@v1
+        with:
+          path: "wiki"
+        env:
+          GH_PERSONAL_ACCESS_TOKEN: ${{ steps.generate_token.outputs.token }}

README.md

@@ -0,0 +1,27 @@
+# linode-cli (lin)
+
+The Linode Command Line Interface
+
+Provides easy access to any of the Linode API endpoints from the command line and displays results in an organized, configurable table. 
+
+This project is automatically generated from the [Linode OpenAPI spec](https://www.linode.com/docs/api/) using the [openapi3 Python package](https://github.com/Dorthu/openapi3).
+
+![Example of CLI in use](https://raw.githubusercontent.com/linode/linode-cli/main/demo.gif)
+
+Visit the [Wiki](../../wiki) for more information.
+
+## Install
+
+Install via PyPI:
+```bash
+pip3 install linode-cli
+```
+
+Visit the [Wiki](../../wiki/Installation) for more information.
+
+## Contributing
+
+This CLI is generated from the [OpenAPI specification for Linode's API](https://github.com/linode/linode-api-docs).  As
+such, many changes are made directly to the spec.
+
+Please follow the [Contributing Guidelines](https://github.com/linode/linode-cli/blob/main/CONTRIBUTING.md) when making a contribution.