Matrix library not included

[Zorbn]

Thanks for writing this library, it's great. I did run into one problem, some errors due to the matrix library being missing. I was able to solve this by copying your matrix library for SchemeGraphics and changing the function names to be mat-* instead of matrix-*, but I assume this file was supposed to be included by default?

Also, Raylib 4.5 changed how cameras work, so it's incompatible with these bindings. Raylib 4.2 works fine so that's what I've been using. Not a big deal but I thought I'd mention it in case you didn't know.

[Yunoinsky]

Thanks for your kind reminder~ I just forgot to push the recent commit to SchemeGraphics.

The suggestion's really nice and I'll try to make some updates this month. (*ゝω・)ﾉThanks!