WIP: CMake Build System Changes

[tomadamatkinson]

This PR is currently a WIP. It does not represent a final solution. Some files have been deleted for readability but may be added back for backwards compatibility.

I am submitting this so that there is a readable diff to aid in discussions in #655

TODO: [ ] Support existing CMake options [ ] Retire Meson / point Meson to CMake targets [ ] Correct feature usage using vcpkg for dependencies including platform specific dependencies [ ] Import vcpkg toolchain instead of using the toolchain file (so we can support emscripten toolchains) [ ] Add support for the test application

Major Changes:

• Organise file structure grouping third parties (vendor), executables (cmd) and libraries (currently stayed in root)
• Add CMake to each required target and remove the relative path dependencies between libraries
• Uses vcpkg automatic dependency toolchain file
• Falls back to CPM to fetch dependencies which are not supported by vcpkg (nfd)

Executables compile on Windows and Linux when using:

cmake -Bbuild -S. -DTRACY_WITH_EXECUTABLES=ON
cmake --build build --target tracy_executables --parallel # Unix might want -- -j 8 depending on the distro

This output is the executables collected into the same folder. CMake places these in build/cmd/<exec>/Debug/<exec>.exe on windows. Linux has a few less indirections