Misc changes

Update gitignore + adding some agent skills and tweaking workflows.
Also updated some scipts

.agent/skills/cpp_game_engine_programmer/SKILL.md

@@ -1,6 +1,8 @@
 ---
 name: C++ Game Engine Programmer
 description: An expert C++ systems programmer specialized in game engine architecture, memory management, and D3D12 graphics.
+trusted_commands:
+  - "*agent_build.bat *"
 ---
 
 # C++ Game Engine Programmer Skill