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`.

package.json

@@ -33,8 +33,8 @@
   },
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "^1.11.1",
-    "@actions/tool-cache": "^2.0.2",
+    "@actions/core": "^3.0.1",
+    "@actions/tool-cache": "^4.0.0",
     "semver": "^7.7.2"
   },
   "devDependencies": {