feat(cli): prioritize GitHub release download with fallback to bundled assets (#81)

- Add GitHubRateLimitError and GitHubDownloadError for better error handling
- Detect rate limits (403 with remaining=0, 429)
- Try downloading from GitHub releases first
- Fall back to bundled assets on network error, rate limit, or download failure
- Add --offline flag to skip GitHub download
- Use GitHub auto-generated archive URL as fallback when no ZIP asset exists
- Update CLI to v1.9.0

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

cli/README.md

@@ -16,15 +16,30 @@ uipro init --ai claude      # Claude Code
 uipro init --ai cursor      # Cursor
 uipro init --ai windsurf    # Windsurf
 uipro init --ai antigravity # Antigravity
+uipro init --ai copilot     # GitHub Copilot
+uipro init --ai kiro        # Kiro
 uipro init --ai codex       # Codex (Skills)
+uipro init --ai roocode     # Roo Code
+uipro init --ai qoder       # Qoder
+uipro init --ai gemini      # Gemini CLI
+uipro init --ai trae        # Trae
 uipro init --ai all         # All assistants
 
+# Options
+uipro init --offline        # Skip GitHub download, use bundled assets only
+uipro init --force          # Overwrite existing files
+
 # Other commands
 uipro versions              # List available versions
 uipro update                # Update to latest version
-uipro init --version v1.0.0 # Install specific version
 ```
 
+## How It Works
+
+By default, `uipro init` tries to download the latest release from GitHub to ensure you get the most up-to-date version. If the download fails (network error, rate limit), it automatically falls back to the bundled assets included in the CLI package.
+
+Use `--offline` to skip the GitHub download and use bundled assets directly.
+
 ## Development
 
 ```bash