Bundled engine plugins updated: Unity-MCP 0.93.0, Godot-MCP 0.25.0, Unreal-MCP 0.19.0

Configuring Antigravity from the engine plugin or the CLI now writes both of its possible config locations, ~/.gemini/config and ~/.gemini/antigravity, so it connects no matter which one your Antigravity install reads, and the plugin shows Antigravity as configured only when both are in place. Regenerating the project key from a CLI now updates every AI agent configured for that project before the old key is revoked, so your other agents keep working. In Unity, the Regenerate key button is now aligned with the Configure button.