feat: SSH config host quick-pick menu

[christophkroeppl]

Summary

• Replace the plain input box in "Connect to Host..." with a QuickPick menu listing all configured SSH hosts from ~/.ssh/config
• Each host shows its HostName, User, and Port as description details
• A separator + "Enter host manually..." option preserves the original input box flow for ad-hoc connections
• The Host alias (not the resolved HostName) is displayed in the status bar indicator (e.g. SSH: myserver)

Test plan

• Verify hosts from ~/.ssh/config appear in the quick-pick when running "Connect to Host..."
• Verify description shows HostName/User/Port where configured
• Verify "Enter host manually..." falls back to the original input box
• Verify the status bar indicator shows the Host alias after connecting
• Verify behavior with no SSH config hosts (should fall back to input box directly)
• Verify Include directives in SSH config are respected

🤖 Generated with Claude Code

[daiyam]

@christophkroeppl Only publish when your PR is fully done. And, you need to manually review the code.