- Add shader class for vertex/fragment program compilation
- Add vao class for vertex array object management
- Render RGB gradient triangle with interpolated vertex colors
- Replace window class with cbt::opengl::context
- Add buffer resource (VBO, EBO, UBO, SSBO) with move semantics
- Add texture resource with format/type enums and filtering
- Add descriptor_set for Vulkan-style resource binding
- All resources use RAII with proper cleanup
- Add asio dependency for async signal handling
- Register SIGINT and SIGTERM to quit the application
- Poll signals each frame for non-blocking shutdown
- Q key and Ctrl+C both cleanly exit the program
- Add cbt::window class in cbt/ directory with RAII lifecycle
- Add setup_opengl and info_opengl for glad init and GL info
- Add Q key to quit the application
- Update CMakeLists.txt with glfw3 and glad dependencies
- Update AGENTS.md with snake_case naming and shell conventions
- Add include ordering rules: C++ std, C std, OS-specific,
third-party, local headers (separated by blank lines)
- Clarify <> for system headers, "" for third-party deps
- Remove .exe from run command
- Mark shell code blocks as sh (POSIX compliant)
- Add shell script conventions section
portersky