Fix all warnings in stb_image with sanitizer support for GCC (MINGW),…

[5433D-R32433]

Pull Request Title:
Fix Warnings and Improve Code Quality in stb_image with Enhanced Sanitizers and Compiler Flags

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Description:
This PR resolves warnings in stb_image.h by applying stricter compiler flags and sanitizers (UBSan, ASan) for GCC, Clang, MSVC, and TCC to improve stability and debugging.

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Changes Made:

• Signed Conversion Fixes: Fixed signed-to-unsigned conversion issues.
• Warnings Addressed:
  • -Wconversion, -Wsign-conversion, -Wlogical-op, -Wpedantic, -Wshadow, -Wformat=2, etc.
• Sanitizer Support:
  • GCC: -fsanitize=undefined,address
  • Clang: -fsanitize=alignment,null,object-size,bounds,enum,float-divide-by-zero,signed-integer-overflow
  • MSVC: /fsanitize=address
  • TCC: Ensured no warnings.

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Rationale:

• Ensures cleaner, more robust code with fewer bugs by catching errors at compile-time and runtime.
• Improves cross-compiler compatibility and debugging experience.

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Testing:

• Changes tested on GCC, Clang, MSVC, and TCC with no warnings and successful execution.

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Checklist:

• Code compiles cleanly with no warnings.
• Sanitizers included and working.
• All tests pass.