feat: Add educative features to help users learn while using OpenHands

Context

Agentic coding tools are powerful but have a steep learning curve. Users often don't know what's possible, how to prompt effectively, or what's happening under the hood. Several competing tools have started tackling this through in-product education:

• Claude Code displays contextual tips during usage (e.g. "Try using /compact to free up context", keyboard shortcuts, workflow suggestions)
  • Claude Code has an /insights command that draws a report on how to use Claude better
• Cursor/Windsurf surface context window usage visually, so users develop intuition about token limits
• Aider shows token cost per message, teaching users about efficiency

OpenHands could differentiate itself by making user education a first-class feature — not just tooltips, but a system that actively helps users become better at working with AI agents.

Next Steps [WIP]

1. List all the competition's educative features
2. Think about new educative features
3. Consolidate
4. Implement