[FR] Support AGENTS.md in Ask Sourcebot

[brendan-kellam]

AGENTS.md files list relevant instructions to coding agents to help them understand a repo's structure and other relevant information.

See: https://agents.md

[sudhanshu112233shukla]

@brendan-kellam I am working on it !! half work is done ,

[sudhanshu112233shukla]

@brendan-kellam do check it !!