feat(mcp): add MCP server with read-only tools for Coolify resources

Add Model Context Protocol server exposing Coolify infrastructure data
to AI assistants. Includes tools for listing/fetching servers, projects,
applications, databases, and services, scoped to authenticated team tokens.

- Add CoolifyServer with 10 read-only tools (list/get for all resource types)
- Add BuildsResponse and ResolvesTeam traits for shared tool logic
- Add EnsureMcpEnabled middleware guarding /mcp routes
- Add enable/disable MCP API endpoints (root-only)
- Add is_mcp_server_enabled toggle in instance settings and advanced UI
- Add migration for is_mcp_server_enabled column
- Add feature tests for MCP endpoints and toggle API
- Scrub sensitive keys (passwords, tokens, raw IDs) from all responses

composer.json

@@ -18,6 +18,7 @@
         "laravel/fortify": "^1.34.0",
         "laravel/framework": "^12.49.0",
         "laravel/horizon": "^5.43.0",
+        "laravel/mcp": "^0.6.7",
         "laravel/nightwatch": "^1.24",
         "laravel/pail": "^1.2.4",
         "laravel/prompts": "^0.3.11|^0.3.11|^0.3.11",