Removed vanilla move/ability behavior override scripts while preserving custom content.
Removed:
- data/cobblemon/abilities/rebalanced_abilities/
- data/cobblemon/abilities/ironfist.js
- data/cobblemon/abilities/snowguard.js
- data/cobblemon/moves/rebalanced_moves/
- data/cobblemon/moves/hiddenpower/
- data/cobblemon/moves/hazard_clearing_moves/
- data/cobblemon/moves/nature_power_moves/
Kept:
- custom/new move scripts
- custom/new ability scripts
- freeze-related custom content
- orb items and related assets
- species additions and other non-behavior datapack content


Additional cleanup:
- Removed all berry held item scripts under data/lasers_additions/mega_showdown/showdown/held_items/berries
- Removed language entries for berry tooltips and other previously existing vanilla moves/abilities/items
- Kept language entries only for frostbite text, the two orb items, and still-present custom moves/abilities
