OpenGLAD v1.0.0

Initial stable release of OpenGLAD, a cross-platform Swift Package wrapper around GLAD 2.

This release introduces the first stable foundation of the project, providing C/Swift interoperability for OpenGL function loading across macOS, Linux, and Windows.

Key highlights:
•⁠ ⁠Integration with GLAD 2.0.8 generated sources
•⁠ ⁠Swift Package Manager support
•⁠ ⁠Clang module map for seamless Swift interoperability
•⁠ ⁠Cross-platform build support (macOS, Linux, Windows)
•⁠ ⁠Clean separation between generated C code and Swift interface layer

This version establishes OpenGLAD as the foundational graphics loading layer for future projects in the OpenSpatial ecosystem.