feat: track both entry files in the repo

~/.claude/CLAUDE.md was in no git repo despite heavy editing, and
~/.codex/AGENTS.md was a hand-synced duplicate of it. Both now live in
entry/ and import the shared fragments; RTK.md moves to claude-md/ so
Codex stops carrying its own copy.

Claude's imports are ~/-anchored so they resolve through the symlink.

Also drops kt from the comment rule scope.

claude-md/code-comments.md

@@ -1,6 +1,6 @@
 ---
 paths:
-  - "**/*.{ts,tsx,js,jsx,mjs,cjs,py,rs,go,sol,sh,bash,zsh,kt,rb,lua,zig,nix,ex,yaml,yml,toml}"
+  - "**/*.{ts,tsx,js,jsx,mjs,cjs,py,rs,go,sol,sh,bash,zsh,rb,lua,zig,nix,ex,yaml,yml,toml}"
 ---
 
 ## Code comments