refactor: 重构 algorithm 为 ai-core 代码解析服务

- 新增 ai-core 目录，包含代码解析核心服务
- 添加 proto 定义、parser、service 模块
- 添加启动脚本和依赖配置

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

ai-core/.gitignore

@@ -0,0 +1,50 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+env/
+venv/
+ENV/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Generated gRPC files (optional - uncomment if you want to exclude them)
+# proto/*_pb2.py
+# proto/*_pb2_grpc.py
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+
+# Environment variables
+.env
+.env.local
+
+# Temporary files
+*.tmp
+*.bak