Several small cleanups

[GravisZro]

Pull Request Type

• [ ] GitHub Workflow changes
• [ ] Documentation or Wiki changes
• [x] Build and Dependency changes
• [ ] Runtime changes
  • [ ] Render changes
  • [ ] Audio changes
  • [ ] Input changes
  • [ ] Network changes
  • [ ] Other changes

Description

Linux/OSX specific fixes

• Replace stricmp function/macro with stricmp macro (identical functionality)
• Consolidate stricmp definitions to just linux_fix.h
• Replace lnxfix.h with linux/linux_fix.h (just a worse version of linux_fix.h)
• Move _stat macro to linux_fix.h
• Fix include statements using '\' deliminator

Multiplatform fixes

• Replace SET_MIN with std::min (identical functionality)
• Replace SWAP with std::swap (identical functionality)
• Remove unused macros
• Move macros for controllers to Controller.h
• Replace _vsnprintf/vsnprintf with std::vsnprintf (identical functionality)

Related Issues

Screenshots (if applicable)

Checklist

• [x] I have tested my changes locally and verified that they work as intended.
• [x] I have documented any new or modified functionality.
• [x] I have reviewed the changes to ensure they do not introduce any unnecessary complexity or duplicate code.
• [x] I understand that by submitting this pull request, I am agreeing to license my contributions under the project's license.

Additional Comments

[GravisZro]

@JeodC, @Lgt2x, @winterheart, Someone, please review and merge or reject this PR because I've had resolve rebase conflicts a ton of times .

[Lgt2x]

Sure, I'll review & test again