Fix: Use latest release tag for install commands (#74)

* fix: Use latest release tag for install commands instead of main branch

The web install commands previously pointed to install.sh from the main branch,
which could be unstable/untested code. Now they dynamically fetch the latest
release tag from GitHub API and use that for the install script URLs.

Changes:
- Add getInstallCommands() function that takes a release tag
- Add latestRelease state that fetches from GitHub releases API
- Update all install commands to use the fetched release tag
- Fallback to 'main' if GitHub API fails

* docs: Update README and docs to use latest release tag

Also update GitHub release workflow to use the release tag dynamically.

Changes:
- README.md: Update install commands to use v0.3.0-alpha tag
- docs/INSTALL.md: Update install command to use v0.3.0-alpha tag
- .github/workflows/release.yml: Use ${{ github.ref_name }} for install URL
- Add note pointing to GitHub Releases for latest version

---------

Co-authored-by: Claude Opus <noreply@anthropic.com>

.github/workflows/release.yml

@@ -74,7 +74,7 @@ jobs:
 
             ### Quick Install (Recommended)
             ```bash
-            curl -fsSL https://raw.githubusercontent.com/jatinkrmalik/vocalinux/main/install.sh | bash
+            curl -fsSL https://raw.githubusercontent.com/jatinkrmalik/vocalinux/${{ github.ref_name }}/install.sh | bash
             ```
 
             ### From Source