feat: loading dots on coop map loads

[KiIoOnline]

Enables the loading dots during transitions/loads in coop. Linux is not supported currently.

[ThisAMJ]

• please switch to a branch before making changes, and rebase instead of merge to update fork. i'll handle it this time.
• try to add instructions on finding sigs/offsets as a comment going forward. here: // "vgui/loading_screens/loadingscreen_coop" xref -> LoadingProgress::SetupControlStates -> m_bDrawProgress set to 0
• Memory::Scan(module, sig, offset) is a valid overload, use that instead of adding the offset yourself. If the sig isn't found, it returns 0 - if we then add an offset it is non-zero (truthy) which could cause crashes

[ThisAMJ]

consider adding to fast load preset (to turn it off, since having it on probably slows things down a bit), and/or moving to Session with the other _loads_ cvars since it's not really a cheat

[ThisAMJ]

oh also restore and delete patch on Cheats::Shutdown

[ThisAMJ]

good enough for now, we can revisit other considerations