Title: Implement minimal core framework with PL injection and update build config

Key features implemented:
- Updated package metadata and dependencies in PKG-INFO, setup files
- Added main.py entry point for backward compatibility with README launch method
- Enhanced CLI with config options, system info command, and proper signal handling
- Implemented minimal PluginManager loading only plugin-loader core plugin
- Refactored PluginLoader to follow minimal core design, removed sandbox/isolation complexity
- Updated auto-dependency plugin with safer PL injection mechanism and disabled pl_injection
- Removed legacy plugin files (firewall, frp_proxy, ftp_server, multi_lang_deploy, ops_toolbox, security_gateway) as functionality moved to core plugin system
- Improved gitignore with comprehensive ignore patterns

The changes implement a minimal core framework design where only the plugin-loader is directly loaded by the core, with all other plugins managed through the PL injection mechanism, significantly simplifying the architecture.

tests/test_config.py

@@ -0,0 +1,105 @@
+"""配置管理测试"""
+import os
+import pytest
+from pathlib import Path
+import tempfile
+import json
+
+from oss.config.config import Config
+
+
+class TestConfig:
+    """配置管理测试类"""
+    
+    def test_default_values(self):
+        """测试默认配置值"""
+        config = Config()
+        assert config.http_api_port == 8080
+        assert config.http_tcp_port == 8082
+        assert config.host == "0.0.0.0"
+        assert config.log_level == "INFO"
+        assert config.permission_check is True
+    
+    def test_env_override(self, monkeypatch):
+        """测试环境变量覆盖"""
+        monkeypatch.setenv("HTTP_API_PORT", "9999")
+        monkeypatch.setenv("LOG_LEVEL", "DEBUG")
+        
+        config = Config()
+        assert config.http_api_port == 9999
+        assert config.log_level == "DEBUG"
+    
+    def test_file_config(self):
+        """测试配置文件加载"""
+        with tempfile.NamedTemporaryFile(mode='w', suffix='.json', delete=False) as f:
+            json.dump({"HTTP_API_PORT": 7777, "LOG_LEVEL": "WARNING"}, f)
+            temp_path = f.name
+        
+        try:
+            config = Config(temp_path)
+            assert config.http_api_port == 7777
+            assert config.log_level == "WARNING"
+        finally:
+            os.unlink(temp_path)
+    
+    def test_env_priority_over_file(self, monkeypatch):
+        """测试环境变量优先级高于配置文件"""
+        with tempfile.NamedTemporaryFile(mode='w', suffix='.json', delete=False) as f:
+            json.dump({"HTTP_API_PORT": 7777}, f)
+            temp_path = f.name
+        
+        try:
+            monkeypatch.setenv("HTTP_API_PORT", "8888")
+            config = Config(temp_path)
+            assert config.http_api_port == 8888  # 环境变量优先
+        finally:
+            os.unlink(temp_path)
+            monkeypatch.delenv("HTTP_API_PORT", raising=False)
+    
+    def test_get_set(self):
+        """测试 get/set 方法"""
+        config = Config()
+        assert config.get("HTTP_API_PORT") == 8080
+        config.set("HTTP_API_PORT", 6666)
+        assert config.get("HTTP_API_PORT") == 6666
+    
+    def test_properties(self):
+        """测试属性访问"""
+        config = Config()
+        assert isinstance(config.data_dir, Path)
+        assert isinstance(config.store_dir, Path)
+        assert config.data_dir.name == "data"
+        assert config.store_dir.name == "store"
+    
+    def test_all_method(self):
+        """测试 all() 方法返回所有配置"""
+        config = Config()
+        all_config = config.all()
+        assert "HTTP_API_PORT" in all_config
+        assert "HOST" in all_config
+        assert len(all_config) > 5
+    
+    def test_bool_conversion(self, monkeypatch):
+        """测试布尔值转换"""
+        monkeypatch.setenv("PERMISSION_CHECK", "false")
+        config = Config()
+        assert config.permission_check is False
+        
+        monkeypatch.setenv("PERMISSION_CHECK", "true")
+        config = Config()
+        assert config.permission_check is True
+    
+    def test_int_conversion(self, monkeypatch):
+        """测试整数转换"""
+        monkeypatch.setenv("MAX_WORKERS", "8")
+        config = Config()
+        assert config.get("MAX_WORKERS") == 8
+        
+        # 无效值应该保持默认
+        monkeypatch.setenv("MAX_WORKERS", "invalid")
+        config = Config()
+        assert config.get("MAX_WORKERS") == 4  # 默认值
+
+
+if __name__ == "__main__":
+    pytest.main([__file__, "-v"])