[Engine] add ResourceStore and WorldResources

[SilverSupplier]

Summary

• ResourceStore, WorldResources 추가
• EngineWorld에서 query / resources / commands 접근 가능하도록 정리
• 관련 테스트 추가 및 기존 engine 테스트 수정

Related Issue

• Closes Task-Implement ResourceStore and WorldResources for shared simulation state #21

Area

• Engine
• Domain
• Application
• Docs
• Build
• Analysis
• Chore

Architecture Check

• I kept the dependency direction application -> domain -> engine.
• I did not add Qt UI code to src/domain.
• I did not add domain or application dependencies to src/engine.
• I used src/ as the include root.

Verification

• cmake --preset windows-debug
• cmake --build --preset build-debug
• ctest --preset test-debug
• Not run (reason below)

Reason:

• no-app 경로로 확인
• cmake --preset windows-debug-no-app
• cmake --build --preset build-no-app-debug
• ctest --preset test-no-app-debug --output-on-failure

Risks / Follow-up

• ResourceStore는 현재 최소 기능만 포함
• reset 정책은 후속 이슈에서 추가 정리 가능