build: Ignore CLAUDE and AGENTS files for now. (#37930)

I want to start using coding assistants and play around with content in
the CLAUDE.md file but I don't want git to complain about it or check it
in for everyone just yet.

Author: feanil

.gitignore

@@ -12,6 +12,8 @@ requirements/edx/private.txt
 lms/envs/private.py
 cms/envs/private.py
 .venv/
+CLAUDE.md
+AGENTS.md
 # end-noclean
 
 ### Python artifacts