Native code graph workflow

This release introduces the DroidCodeGraph extension, bringing Graphify-backed project graphs into the native app workflow.

The goal is to give agents and humans a better map of the codebase instead of sending everyone into the forest with a flashlight and good intentions.

• Added DroidCodeGraph extension support
• Implemented CodeGraph agent functionality
• Improved footer controls for graph runs and graph surfaces
• Packaged the first release of the graph workflow