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

params.conf.example

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+# P2Pool Configuration File Example
+# Copy this file to /var/lib/p2pool/params.conf and edit as needed
+
+# =============================================================================
+# Monero Node Connection (REQUIRED)
+# =============================================================================
+# IP address or hostname of your Monero node
+host = 127.0.0.1
+
+# Monero RPC port
+rpc-port = 18081
+
+# Monero ZMQ port (required for optimal performance)
+zmq-port = 18083
+
+# =============================================================================
+# Wallet Configuration (REQUIRED)
+# =============================================================================
+# Your Monero wallet address - THIS IS REQUIRED
+# Replace with your actual wallet address
+wallet = YOUR_MONERO_WALLET_ADDRESS
+
+# =============================================================================
+# P2P Network Settings
+# =============================================================================
+# P2P bind address and port for P2Pool network communication
+p2p = 0.0.0.0:37889
+
+# Add known peer nodes (optional)
+# addpeers = node1.p2pool.io:37889,node2.p2pool.io:37889
+
+# =============================================================================
+# API Settings
+# =============================================================================
+# Directory for data API files
+data-api = /var/lib/p2pool/data-api
+
+# Enable local API (recommended for monitoring)
+local-api = true
+
+# =============================================================================
+# Mining Mode
+# =============================================================================
+# Use mini sidechain for smaller miners (lower difficulty)
+# Uncomment if your hashrate is less than 50 KH/s
+# mini = true
+
+# =============================================================================
+# Stratum Server (for connecting miners)
+# =============================================================================
+# Enable stratum server for miners to connect
+# Format: <bind_ip>:<port>
+# Uncomment and configure if you want to connect mining software
+# stratum = 0.0.0.0:3333
+
+# =============================================================================
+# Merge Mining (Optional)
+# =============================================================================
+# Enable Tari merge mining
+# Format: tari://<tari_node_ip>:<port> <tari_wallet_address>
+# Uncomment and configure if you want to merge mine Tari
+# merge-mine = tari://127.0.0.1:18142 YOUR_TARI_WALLET_ADDRESS
+
+# =============================================================================
+# Logging
+# =============================================================================
+# Log file location
+log-file = /var/log/p2pool/p2pool.log
+
+# Log level (0 = none, 1 = fatal, 2 = error, 3 = warn, 4 = info, 5 = debug, 6 = trace)
+loglevel = 3
+
+# =============================================================================
+# Performance Tuning (Advanced)
+# =============================================================================
+# Number of light cache blocks to keep in RAM
+# in-peers = 10
+# out-peers = 10
+
+# =============================================================================
+# Network Settings (Advanced)
+# =============================================================================
+# SOCKS5 proxy for outgoing connections
+# socks5 = 127.0.0.1:9050