Python Telegram Bot Development

I need a Telegram bot written in Python that can converse fluently through normal text replies, react to explicit /commands, and present inline or reply-markup buttons when prompted.

Because the interaction layer is the heart of this project, please focus on:

• Text responses – the bot should recognise and answer free-form messages I define.
• Command inputs – typical “/start”, “/help” and any extra commands I’ll list once we begin.
• Button clicks – inline and keyboard buttons that trigger specific callbacks.

Deliverables
1. Clean, commented Python source (preferably using python-telegram-bot, aiogram, or another well-maintained library).
2. A short README that shows how to run it locally and how to deploy to a VPS or Heroku-style container.
3. Sample config/env file so I can drop in my own token.
4. Quick demo video or screenshots confirming the three interaction modes work inside an actual chat.

Acceptance criteria
• I can install dependencies with one command and launch the bot without code edits (other than setting my token).
• Each interaction type responds within the chat exactly as described.
• Code follows PEP-8 and includes docstrings for all functions.