feat: establish unified project foundation with root config cleanup

- Archive legacy packages/, services/, server/ directories
- Update pnpm workspace to web + browser-ext
- Simplify root package.json scripts to delegate to web/
- Update turbo.json for new workspace structure
- Remove obsolete root config files (vite, tsconfig, etc.)
- Add .nvmrc, .editorconfig for consistent dev environment
- Update CI workflow to remove references to deleted packages
- Add missing dependencies (@tailwindcss/vite, tailwindcss) to web
- Add test and lint scripts to web package
- Verify pnpm install, build, and dev work correctly

docker-compose.yml

@@ -1,53 +0,0 @@
-version: '3.8'
-
-services:
-  postgres:
-    image: postgres:15-alpine
-    container_name: shieldsai_postgres
-    environment:
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: postgres
-      POSTGRES_DB: shieldsai_dev
-    ports:
-      - "5432:5432"
-    volumes:
-      - postgres_data:/var/lib/postgresql/data
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U postgres"]
-      interval: 5s
-      timeout: 5s
-      retries: 5
-
-  redis:
-    image: redis:7-alpine
-    container_name: shieldsai_redis
-    ports:
-      - "6379:6379"
-    volumes:
-      - redis_data:/data
-    healthcheck:
-      test: ["CMD", "redis-cli", "ping"]
-      interval: 5s
-      timeout: 5s
-      retries: 5
-
-  mailhog:
-    image: mailhog/mailhog:latest
-    container_name: shieldsai_mailhog
-    ports:
-      - "1025:1025"  # SMTP
-      - "8025:8025"  # Web UI
-    depends_on:
-      - postgres
-
-  adminer:
-    image: adminer:4
-    container_name: shieldsai_adminer
-    ports:
-      - "8080:8080"
-    depends_on:
-      - postgres
-
-volumes:
-  postgres_data:
-  redis_data: