The cache is now thread-safe using std::shared_mutex, allowing concurrent reads without blocking and some other minor things to better maintenance
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/199
Co-authored-by: MrPurple666 <mrpurple666@noreply.localhost>
Co-committed-by: MrPurple666 <mrpurple666@noreply.localhost>