添加配置文件管理和完整文档系统

- 重构配置方式：使用 params.conf 替代命令行参数
- postinst 自动创建配置文件，升级时保护用户配置
- 初始化 llmdoc 文档系统（概述、架构、指南、参考）
- 创建 README.md 和配置指南
- 提供完整的配置模板示例

配置文件优势：升级安全、集中管理、易于维护

README-params.md

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+# P2Pool Configuration File Guide
+
+## Overview
+
+P2Pool uses a configuration file (`params.conf`) to manage all runtime settings. This approach provides several advantages over command-line parameters:
+
+- **Upgrade Safety**: Configuration is preserved during package upgrades
+- **Centralized Management**: All settings in one location
+- **Documentation**: In-file comments explain each option
+- **Maintainability**: Easy to review and modify settings
+
+## Configuration File Locations
+
+### Debian Package Installation
+```
+/var/lib/p2pool/params.conf
+```
+
+### Manual Installation
+```
+./params.conf (in the working directory)
+```
+
+## Basic Configuration Example
+
+```conf
+# Minimum required configuration
+host = 127.0.0.1
+rpc-port = 18081
+zmq-port = 18083
+wallet = 4xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+```
+
+## Advanced Configuration
+
+See [params.conf.example](params.conf.example) for a comprehensive configuration template with all available options.
+
+## Configuration Best Practices
+
+1. **Always backup** your `params.conf` before making changes
+2. **Test changes** by running P2Pool manually before updating the systemd service
+3. **Use comments** to document your customizations
+4. **Keep sensitive data secure**: The config file contains your wallet address
+
+## Switching from Command-Line to Configuration File
+
+If you're currently using command-line parameters, you can convert them to a configuration file:
+
+```bash
+# Old way (command-line)
+p2pool --host 127.0.0.1 --rpc-port 18081 --wallet YOUR_WALLET
+
+# New way (configuration file)
+p2pool --params-file params.conf
+```
+
+## Testing Your Configuration
+
+```bash
+# Test configuration before starting the service
+sudo -u p2pool /opt/p2pool/p2pool --params-file /var/lib/p2pool/params.conf
+
+# If everything looks good, start the service
+sudo systemctl start p2pool.service
+```
+
+## Troubleshooting
+
+### Configuration Not Loading
+
+1. Check file permissions:
+   ```bash
+   ls -l /var/lib/p2pool/params.conf
+   # Should be readable by p2pool user
+   ```
+
+2. Verify file syntax:
+   ```bash
+   # No equal signs in comments
+   # Use "key = value" format
+   # One setting per line
+   ```
+
+3. Check systemd service logs:
+   ```bash
+   sudo journalctl -u p2pool -n 50
+   ```
+
+### Common Mistakes
+
+- ❌ Missing wallet address
+- ❌ Incorrect Monero node connection settings
+- ❌ Syntax errors (missing `=`, extra spaces)
+- ❌ Commented-out required settings
+
+## Migration from Older Versions
+
+If you're upgrading from a version that used systemd service file configuration:
+
+1. Copy your settings from the old service file
+2. Convert them to `params.conf` format
+3. Update the service file to use `--params-file`
+4. Restart the service
+
+Example migration:
+```bash
+# Old (in systemd service)
+ExecStart=/opt/p2pool/p2pool --host 127.0.0.1 --wallet XXXXX
+
+# New (in params.conf)
+host = 127.0.0.1
+wallet = XXXXX
+```