Collapsible gamerules screen

[1.0.11+26.2]

• Eliminated O(N²) Nested List Scans: Wired CategoryTreeBuilder into AbstractGameRulesScreenRuleListMixin, ingesting rule entries in a single O(N) linear pass.
• Zero-Allocation Category Toggling: Category toggling now operates at O(C + M) via pre-grouped CategoryGroup structures, eliminating repeated translation parsing and string prettification allocations on every click.