Compiling the precompiled headers for `CemuCamera` took longer than compiling `CemuCamera` itself, so it just ends up being noticeably faster to just add it to one of the existing sublibs. It probably wasn't a problem for MSVC because precompiled header reuse works there, but I'm not using MSVC
HLE modules now have a unified interface via which they can get notified when mapped into the process or when loaded/unloaded.
We also always call the unload functions when stopping emulation to give the module implementations a chance to reset all state (although many of them are still missing proper cleanup code for now)
