Huge Changes:
- Parametrical generation of VCPKG-Package-Variables, that way we can also check if the user is using the correct names!!!
- Made spdlog header only (with external header-only fmt), glad/glfw3 get included into the project via imgui examples, and they are header-only so yeah
- Next Steps: Make ImGui a dll Project (because for some reason the triplet file does not work?, also include the other modules back into CMAke and try if the engine works lol
- Also boolinq was removed from the engine and is now incorporated via VCPKG, because it has nothing to do with the engine directly