chore: remove agent config (litestar-org#591)

Until the AI coding setup is a bit more polished, I'm removing it from the code.  It can/will be re-added at a later date as everyone agrees to the content.

Author: cofin

.claude/AGENTS.md

@@ -179,15 +179,10 @@ cython_debug/
 .todos
 .tmp
 .envs/
-.claude/*
-.claude/archive/*
-!.claude/archive/.gitkeep
-!.claude/commands
-!.claude/agents
-!.claude/AGENTS.md
-!.claude/README.md
-requirements/archive/*
-!requirements/archive/.gitkeep
-requirements/*
-!requirements/example-feature
-!requirements/README.md
+.claude
+.gemini
+specs
+requirements
+AGENTS.md
+CLAUDE.md
+GEMINI.md