Add Civ Lite multi-civ setup

[YfengJ]

Closes #22.

Summary

• adds a tested setup model for map size, civilization count, difficulty, seed, victory toggles, diplomacy, and AI personality plans
• adds a compact Civ Lite setup panel that can rebuild the game with 2-4 civilizations and show civilization/diplomacy state
• updates Civ Lite state, bot turns, targeting, visibility, city/unit rendering, and capture logic to support multiple AI civilizations without touching wallet/Web3/payment flows

Validation

• find demo/civ-lite -name '*.test.mjs' -print | sort | xargs node --test\n- node --check demo/civ-lite/setup-model.js && node --check demo/civ-lite/game.js && node --check demo/civ-lite/sprites.js\n- git diff --check\n- Chrome/Playwright smoke against demo/civ-lite/index.html: rebuilt a 4-civ Wide/Hard seed-77 game, verified Aggressive/Expansive/Scientific roster, AI-AI peace diplomacy rows, nonblank canvas, and no page/resource errors except favicon

[YfengJ]

CI note: SonarCloud now passes on the latest head with 0 new issues after the cleanup push. The remaining red check is the known Godot Web export preset configuration failure (Cannot export project with preset "Web" due to configuration errors), which is unrelated to this Civ Lite JS setup change.

Local validation completed:

• find demo/civ-lite -name '*.test.mjs' -print | sort | xargs node --test\n- node --check demo/civ-lite/setup-model.js && node --check demo/civ-lite/game.js && node --check demo/civ-lite/sprites.js\n- git diff --check\n- Chrome/Playwright smoke: rebuilt a 4-civ game, verified AI personalities/diplomacy rows, and confirmed the canvas rendered

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud