feat(web): expand Rules page with comprehensive ship reference

Replace the condensed battle reference with full ship-related content
from the complete Spelljammer reference. Now includes 18 sections:
General Spelljamming Rules, Ships, Ship Size, Maneuverability, Weapons,
Targeted Shots, Combat Turn, Complications, On-Deck/Below-Deck, Big
Damage rules, Ship & Weapon Stats (Appendix A), Subsystems & Upgrades
(Appendix B), Magic Items (Appendix C), NPC Crew (Appendix D),
Recovering Hull Points, Advanced Rules, Stunts (Appendix G), and a
Quick Reference checklist. Excludes Cards/Deck Building and Appendix F
(enemies) per request.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/pages/RulesPage.tsx

@@ -29,7 +29,7 @@ export default function RulesPage() {
 
   return (
     <>
-      <TopBar title="Battle Reference" />
+      <TopBar title="Ship Reference" />
       <PageContainer>
         <div className="rules-actions">
           <button className="btn-secondary btn-sm" onClick={expandAll}>