Port Management

Detect framework, find a free port, and start the dev server with the correct port flag. Resolves port conflicts automatically.

For OS-specific commands (macOS/Linux/Windows), see references/platform-commands.md.

Progress Checklist

Port Management Progress:
- [ ] Step 1: Parsed arguments (mode, preferred port)
- [ ] Step 2: Scanned ports for current usage
- [ ] Step 3: Detected framework from project files
- [ ] Step 4: Found available port
- [ ] Step 5: Started server with correct flag

Step 1: Parse Arguments