Bunch of crash fixes — Touhou Lensed Night Sky, Kaseigai Steam update #999723

Since the delay was announced, i thought i'd go ahead and port some of our major crash fixes from our dev build so the game is a bit more stable for those buying the game from the summer sale:Fixed lingering regret crashing on some kinds of bulletsFixed a crash showing up in st_hurtFixed multiple misc issues and errors to do with our compilerI dont really know the full scope of these, but issues this fixes include the cursor going faster than intended in all menus, and a couple of "index out of bounds request" crashesFixed an engine error to do with arraysThis fixes a whole class of crashes that show up as "array_get" index out of range.the dumbass achievement now works on stage 1 all bullet clearing code should be much fasterAs a reminder, if you get any crashes or bugs, please send us the deets on discord or in twitter dms. there's a chance any bugs you run into aren't fixed in our dev...