Add Gitea & Forgejo Connect tab

New

• Added Gitea & Forgejo Connect tab — after deploying via the Stack Wizard, a new tab with a guided 5-step "Connect Your Machine" flow for SSH key setup, host key verification, connection testing, and ready-to-use git commands

• Automatic SSH configuration — when the connection test passes, ServerCompass writes the correct entries to ~/.ssh/config so git push and git clone work immediately

• Location indicators on each step — the Connect flow shows whether each step runs on "Your Machine" or on the "VPS"