feat: Discord bot Phase 1 MVP implementation

Implemented Phase 1 of ClaudeTools Discord bot with:

Core Features:
- Discord.py bot with message content intents
- Claude API integration with streaming responses
- Thread-based conversations with context management
- @mention handling with automatic thread creation
- Tool definitions for future ClaudeTools/remediation integration

Architecture:
- bot/main.py: Entry point with Discord client setup
- bot/config.py: Pydantic Settings for environment config
- bot/claude/client.py: Anthropic SDK wrapper with streaming
- bot/claude/tools.py: Tool definitions and system prompt
- bot/handlers/message_handler.py: Discord message handling

Configuration:
- requirements.txt: Python dependencies (discord.py, anthropic, httpx)
- .env.example: Environment variable template
- .gitignore: Sensitive data protection
- README.md: Comprehensive setup and usage guide

Next Steps (Phase 2):
- Implement tool execution (ClaudeTools API client)
- Add user role mapping and permissions
- Implement audit logging

Deployment Target: BEAST (Windows) as NSSM service
Test: @ClaudeTools hello should create thread and stream response

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

projects/discord-bot/.env.example

@@ -0,0 +1,21 @@
+# Discord Configuration
+DISCORD_TOKEN=your_discord_bot_token_here
+DISCORD_GUILD_ID=your_guild_id_here
+
+# Anthropic Claude API
+ANTHROPIC_API_KEY=your_anthropic_api_key_here
+
+# ClaudeTools API
+CLAUDETOOLS_API_URL=http://172.16.3.30:8001
+CLAUDETOOLS_API_KEY=your_api_key_here
+
+# File Paths (Windows paths for BEAST)
+VAULT_PATH=D:\vault
+CLAUDETOOLS_ROOT=D:\claudetools
+
+# Logging
+LOG_LEVEL=INFO
+LOG_FILE=logs/bot.log
+
+# Optional: Override Git Bash location
+# GIT_BASH_PATH=C:\Program Files\Git\bin\bash.exe