feat(telegram-chat-bot): implement AI chat bot with multi-model support

- Add NestJS service with Telegraf for Telegram bot
- Implement commands: /models, /model, /new, /convos, /history, /clear
- Create Chat API client for completions and conversations
- Support multiple AI models (local Gemma + cloud via OpenRouter)
- Sync conversations with Chat web/mobile app
- Add message splitting for long responses
- Include Dockerfile, CLAUDE.md, and setup script

Commands:
- Send text → AI responds
- /models - List available models
- /model [name] - Switch model (gemma, claude, gpt, etc.)
- /new [title] - New conversation
- /convos - List conversations
- /history - Show recent messages
- /clear - Clear context

https://claude.ai/code/session_01LwmhvhKpEsvVtY1ZKhYu6f

services/telegram-chat-bot/Dockerfile

@@ -0,0 +1,35 @@
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+RUN corepack enable && corepack prepare pnpm@9.15.0 --activate
+
+COPY package.json pnpm-lock.yaml* ./
+COPY services/telegram-chat-bot/package.json ./services/telegram-chat-bot/
+
+RUN pnpm install --frozen-lockfile --filter @manacore/telegram-chat-bot
+
+COPY services/telegram-chat-bot ./services/telegram-chat-bot
+
+WORKDIR /app/services/telegram-chat-bot
+RUN pnpm build
+
+FROM node:20-alpine AS runner
+
+WORKDIR /app
+
+RUN corepack enable && corepack prepare pnpm@9.15.0 --activate
+
+COPY --from=builder /app/services/telegram-chat-bot/dist ./dist
+COPY --from=builder /app/services/telegram-chat-bot/package.json ./
+COPY --from=builder /app/services/telegram-chat-bot/node_modules ./node_modules
+
+ENV NODE_ENV=production
+ENV PORT=3305
+
+EXPOSE 3305
+
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+  CMD wget --no-verbose --tries=1 --spider http://localhost:3305/health || exit 1
+
+CMD ["node", "dist/src/main.js"]