Fix SOC freeslotting including trailing spaces in constant names

See merge request !2415

Sprite names up to 64 character long and 256 frames per sprite

See merge request !2394

replace CPM with vcpkg

See merge request !2321

Make Extra Time powerup work in old-style special stages

See merge request STJr/SRB2!2292

Support LF_MIXNIGHTSCOUNTDOWN for old-style special stages

See merge request !2291

Fix softlock on old special stages when running out of time due to being hit

See merge request !2398