MAC: Add Metal backend, native app bundle packaging, rpath dylib resolution, and separate Xcode/Makefiles build scripts

[soum1-d]

Description

This PR introduces comprehensive macOS cross-platform support and adds a native Metal rendering backend to TimeEngine alongside existing graphics APIs.

Key Changes:

• Metal Rendering Backend:

  • Implemented MetalRendererAPI, MetalVertexBuffer, MetalIndexBuffer, MetalVertexArray, MetalFramebuffer, and MetalShader in Engine/Include/Renderer/Metal/ and Engine/src/Renderer/Metal/.
  • Added GraphicsAPI::Metal to GraphicsAPI enum and integrated factory instantiations across VertexBuffer::Create, IndexBuffer::Create, VertexArray::Create, Framebuffer::Create, and Shader::Create.
  • Enabled TE_SUPPORT_METAL and TE_SUPPORT_OPENGL support detection for macOS in PreRequisites.h.

• Premake5 & macOS Application Bundling:

  • Configured Premake5.lua to generate native macOS .app bundles (WindowedApp) with embedded Info.plist metadata.
  • Added .mm Objective-C++ file compilation support and linked Metal.framework, QuartzCore.framework, Cocoa.framework, IOKit.framework, CoreFoundation.framework, and CoreVideo.framework.
  • Removed duplicate static glfw3 linkage from TimeEditor target on macOS to prevent duplicate Objective-C class symbol collisions (GLFWHelper, GLFWApplicationDelegate) with libEngine.dylib.

• Relocatable Dynamic Library Resolution (@rpath):

  • Configured @rpath/libEngine.dylib and @rpath/libVelox.dylib install names and set LD_RUNPATH_SEARCH_PATHS = "@executable_path" for TimeEditor bundle targets.
  • Added post-build script phases to automatically copy libEngine.dylib and libVelox.dylib into TimeEditor.app/Contents/MacOS/.

• Build Pipeline & Release Packaging:

  • Separated and updated macOS build scripts under Scripts/Mac/Xcode/ and Scripts/Mac/Makefiles/.
  • Updated BuildCommercialRelease.sh to bundle TimeEditor.app with embedded dynamic libraries, automatic install_name_tool fixups, and ad-hoc code signing (codesign --force --deep).
  • Updated llms.md & llms.txt architecture reference documentation to include Metal backend support.

Related Issues

Cross platform portability for Mac.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Style / Refactoring

How Has This Been Tested?

I have built the project and run the app in Mac.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Determinism Check: If adding logic, I have ensured it is deterministic and time-aware.

[1SHAMAY1]

@soum1-d hard reset and make a single proper commit instead of 7 different commits.
I asked you to rebase and commit with no ammend and force push but you haven't done that.
I can see 7 different commits if you have done what i told you it will have 1 commit only.