Features

add itemdata::FlashCSet, improve itemdata::CSet fa55a6f26

itemdata::CSet contained both the normal and flash csets, and required bitwise operations to access. It also didn't allow for setting the flash cset. Now, itemdata::CSet is only for the normal cset, and the flash cset uses the new itemdata::FlashCSet.
support expression in default parameters d2dd3eebf
The default for optional parameters no longer need to be constant. For example, this is now valid:
```
void debug(int num, int x = Player->X, int y = Player->Y - 10) {
	// draw num at x, y ...
}
```

Bug Fixes

inline function optimization handles LOAD correctly 0c8cc8624
prevent crash in walkable cheat from bad screen access (z3 regression) c45e7775c
prevent crash when closing title screen without loading quest (z3 regression) 8dc032496
prevent crash when opening boss lock block (z3 regression) 8d939805f
prevent crash when grabbing item during screen scroll (z3 regression) f7466e901

use correct upper limit when setting itemdata Tile 4346780f3
use lexical scoping for namespace compiler options 215607727

Previously, namespaces would ignore options defined in the file scope. Also, options defined in one namespace block would be applied to every namespace block of the same name.

See https://discord.com/channels/876899628556091432/1243749050616905768.
prevent crash when processing script node with no script object 7552852a9