Allow flag-based control of block falling direction via InvertFallingDirFlag field on FallingComponent

[aonkeeper4]

Also adds a property to Gravity Dream Blocks and Inversion Blocks to support this

[swoolcock]

Looks okay, but I'll probably go through and move some things around for optimisation, etc.

Also ahhhhhhhhhh all the whitespace reformatting!

[swoolcock]

@aonkeeper4 Can you please check that this still does what you want it to? The changes I made were:

• Just use a single checking function rather than a wrapper property; I'd rather not have the set and get be out of sync if possible.
• Cache the return of the check where possible (if it's guaranteed to be the same frame).
• Reverted the Lua formatting; I'm going to do a full pass over the project at some point so it'll probably be its own branch.

[aonkeeper4]

yeah this all seems to still be working as expected, thanks for taking a look!
also sorry about all the lua reformatting and me taking a while to respond, i don't really check github notifications