refactor: simplify prompt to direct agent to explore AWF repo

Reverted the detailed architecture documentation and instead instructed the agent to:
1. Explore https://github.com/githubnext/gh-aw-firewall
2. Read key source files to understand the firewall architecture
3. Devise escape strategies based on their understanding
4. Execute attacks methodically and document results

Co-authored-by: Mossaka <5447827+Mossaka@users.noreply.github.com>

Author: Copilot