This updates `fmt` to the latest version and moves to just being a copy
of their repo to make updating easier (no editing their cmake / figuring
out which files to minimally include).
The motivation for this is now that we switched to C++ 20, there were a
ton of deprecated function usages that is going away in future compiler
versions. This gets rid of all those warnings.
* wip, taking a break to work on asm stuff first
* the goal code for sparticle
* mips2c the first sparticle asm function
* temp
* particle processing no longer crashing
* temp
* working texture cache for vi1 and hud textures
* sprites
* cleanup 1
* temp
* temp
* add zstd library
* temp
* working
* tests
* include fix
* uncomment
* better decomp of sparticle stuff, part 1
* update references
Tyler Wilding