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.

future_oss.egg-info/PKG-INFO

@@ -0,0 +1,10 @@
+Metadata-Version: 2.4
+Name: future-oss
+Version: 1.2.0
+Summary: Future OSS - 一切皆为插件的开发者工具运行时框架
+Requires-Python: >=3.10
+License-File: LICENSE
+Requires-Dist: click>=8.0
+Requires-Dist: pyyaml>=6.0
+Requires-Dist: websockets>=12.0
+Dynamic: license-file