fix: v1 setup on Linux musl (#432)

## Summary

- Detect Linux musl runners in the v1 action and download the Supabase
CLI `.apk` asset for CLI versions `>= 2.99.0`.
- Add the extracted `usr/bin` directory to `PATH` for `.apk` archives.
- Backport the optional `github-token` input for authenticated `latest`
release lookup, because the test matrix hit unauthenticated GitHub API
rate limits.
- Rebuild `dist/index.js` for the Node action.

## Validation

- `npm run format:check`
- `npm run lint`
- `npm test`
- `npm run package`
- Local Docker smoke test in `node:20-alpine` with
`INPUT_VERSION=2.100.1`
- setup-cli-testing workflow:
https://github.com/jgoux/setup-cli-testing/actions/runs/26165593808

The external workflow passed Alpine `2.100.1`, Alpine `latest`, and
Ubuntu/macOS/Windows with both `2.100.1` and `latest`.

README.md

@@ -44,6 +44,7 @@ steps:
   - uses: supabase/setup-cli@v1
     with:
       version: latest
+      github-token: ${{ github.token }}
   - run: supabase init
   - run: supabase db start
 ```
@@ -55,9 +56,10 @@ on Windows and macOS runners.
 
 The actions supports the following inputs:
 
-| Name      | Type   | Description                        | Default  | Required |
-| --------- | ------ | ---------------------------------- | -------- | -------- |
-| `version` | String | Supabase CLI version (or `latest`) | `2.20.3` | false    |
+| Name           | Type   | Description                                                                | Default  | Required |
+| -------------- | ------ | -------------------------------------------------------------------------- | -------- | -------- |
+| `version`      | String | Supabase CLI version (or `latest`)                                         | `2.20.3` | false    |
+| `github-token` | String | GitHub token used to resolve `latest` without unauthenticated API limiting |          | false    |
 
 ## Advanced Usage
 
@@ -135,8 +137,8 @@ need to perform some initial setup steps before you can develop your action.
 
 ## Publish to a distribution branch
 
-Actions are run from this GitHub repository so we will checkin the packed `dist`
-folder.
+Actions are run from this GitHub repository so we will check in the packed
+`dist` folder.
 
 1. Create a new GitHub release
 2. Rebase `v1` branch on `main`
@@ -155,6 +157,7 @@ repository (see [test.yml](.github/workflows/test.yml))
 uses: ./
 with:
   version: latest
+  github-token: ${{ github.token }}
 ```
 
 See the [actions tab](https://github.com/supabase/setup-cli/actions) for runs of