feat(WHE-21): scaffold grammy webhook bot server

apps/bot/src/bot.ts

@@ -0,0 +1,26 @@
+import { Bot } from 'grammy'
+
+export function createTelegramBot(token: string): Bot {
+  const bot = new Bot(token)
+
+  bot.command('help', async (ctx) => {
+    await ctx.reply(
+      [
+        'Household bot scaffold is live.',
+        'Available commands:',
+        '/help - Show command list',
+        '/household_status - Show placeholder household status'
+      ].join('\n')
+    )
+  })
+
+  bot.command('household_status', async (ctx) => {
+    await ctx.reply('Household status is not connected yet. Data integration is next.')
+  })
+
+  bot.catch((error) => {
+    console.error('Telegram bot error', error.error)
+  })
+
+  return bot
+}