Add manual Telegram broadcast workflow

[quickerup]

Motivation

• Ensure the repository exposes a manual run button for the broadcast workflow by preserving a workflow_dispatch trigger in the workflow file.
• Provide a stable broadcast action that sends a Google Drive document to Telegram without being overwritten by the import/seed tooling that was stripping YAML triggers.
• Include an inline button to chain a /trigger callback that points to this repository and workflow so subsequent broadcasts can be invoked from Telegram.

Description

• Add .github/workflows/bot_mrriebor.yml defining a Broadcast workflow with both push and workflow_dispatch triggers.
• Implement a single job that uses curl to call https://api.telegram.org/bot$TOKEN/sendDocument with TELEGRAM_BOT_TOKEN and TELEGRAM_CHAT_ID supplied from secrets.
• Embed an inline keyboard in the reply_markup that contains the callback data /trigger quickerup/telegram-worker-bot-template bot_mrriebor.yml main to allow continuation from Telegram.

Testing

• Ran the verification script node -e "const fs=require('fs'); const s=fs.readFileSync('.github/workflows/bot_mrriebor.yml','utf8'); if(!s.includes('workflow_dispatch:')) process.exit(1); console.log(s)" which exited successfully and printed the workflow contents.

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Codex Task