* build: Experimentally switch to gcc on macOS
* build: Corrected gcc paths
* build: Enable objective c support on macOS
* build: Enable ObjC and ObjC++ on macOS
* build: Add ObjC and ObjC++ flags
* build: Try compiling objc with clang
* build: Remove invalid flags again
* fix: Let's not include objc headers in C++ code
* sys: Move macos utils code to its own file
* fix: Missing unistd include on mac
* sys: Removed loader script stuff since it's currently unused and broken
* fix: Missing include
* fix: Another missing include
* fix: CFURLCreateWithBytes wants a pointer to mutable data
* fix: Try disabling name mangling of ObjC functions
* sys: Move macos utils declarations to its own header file
* fix: C Linkage
* fix: Move objc function prototypes to C++ headers
* fix: More missing includes
* fix: Warning error
* sys: Call ObjC with C ABI instead of trying to use C++
* build: Update libraries
* sys: Fixed build errors
* sys: No const correctness I guess
* sys: Fixed prototypes
* sys: This is C now
* sys: More nullptr -> NULL
* sys: Fix crash on exit
* sys: Try using proper std concepts instead of custom ones
* sys: Replaced another hex::is_signed
* build: Upgrade to gcc 12 and MacOS Monterey
* build: Fixed MacOS runner name
* build: Cache correct ccache folder on macOS
* sys: Make ImHex compile with -Wall -Wextra -Werror
* sys: Fixed various build errors on Linux
* sys: Explicitly ignore return value of `system` function
* sys: More fixes for the warnings GitHub Actions enables somehow
* sys: More fixes
* sys: Remove -Werror again to see all GitHub Actions warnings
* sys: Hopefully fixed all remaining warnings
* sys: Added back -Werror
* git: Change windows icon in GitHub Actions
