feat: Helper OwnClsnScale, InCustomAnim, AnimPlayerNo, IkemenVersion

[potsmugen]

Feat:

• Helper OwnClsnScale. Using this parameter when creating a helper will make its Clsn box scale use its own scale instead of the root's. Implements #1984
• InCustomAnim trigger. Returns 1 if the player is using someone else's animations (mostly after ChangeAnim2)
• AnimPlayerNo trigger. Returns player number of animation owner
• IkemenVersion trigger. Returns the char's Ikemen version as a float

Refactor:

• Untangled "shadow add" logic from "sprite add" logic
• Front/back and top/bottom size dimensions will now automatically flip when for instance front is behind back. Much like Clsn boxes. Partial fix for #2008. At this point not sure if a complete "fix" is desirable
• Improved syntax of AnimFrame lua version
• Moved width check outside of Clsn check. This allows manipulating its variables more freely. Fixes Reversaldef not accounting for width
• Player pushing can now also happen in the Z axis

Fixes:

• Fixed bug where specifying "reflect = 0" under stage shadow group would disable reflections
• Fixed the announcer still calling the fight in Training mode when the intros are skipped immediately