[Feature] Port /mcp command to oclite

[randomm]

Summary

Port the /mcp command from opencode CLI to oclite, allowing users to manage MCP servers via interactive select dialog.

Requirements

Core Functionality

• List all configured MCP servers with status icons:
  • ✓ connected
  • ○ disabled
  • ✗ failed (show error)
  • ⚠ needs authentication
• Toggle servers on/off with space key
• Restart servers with 'r' key
• OAuth authentication flow for servers that need it

UI Pattern

Use existing select.ts component with extended key bindings:

• ↑/↓ - Navigate
• Space - Toggle selected server on/off
• r - Restart selected server
• Enter - Initiate OAuth if needed, otherwise close
• Escape - Close

Implementation Notes

Files to modify:

• packages/opencode/src/cli/lite/commands.ts - Add handleMcp() function
• packages/opencode/src/cli/lite/index.ts - Register /mcp command
• packages/opencode/src/cli/lite/select.ts - May need to extend for space/r key bindings

MCP operations available:

• MCP.status() - Get all server statuses
• MCP.connect(name) - Enable/connect server
• MCP.disconnect(name) - Disable server
• Restart = disconnect + connect

Reference:

• Full CLI implementation: packages/opencode/src/cli/cmd/mcp.ts
• MCP module: packages/opencode/src/mcp/index.ts

Acceptance Criteria

• /mcp command shows list of MCP servers with status
• Space key toggles server on/off
• 'r' key restarts selected server
• Status updates after toggle/restart
• Works with existing select.ts component pattern
• Reusable pattern for future /models enhancements