chore: match Claude Code ignores at any depth

Pattern with internal slash is anchored to repo root; nested checkouts
(e.g. monorepos with apps/*/.claude/) leaked settings.local.json.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 1995parham

git/gitignore

@@ -70,6 +70,6 @@ Session.vim
 *~
 
 ### Claude Code
-.claude/settings.local.json
-CLAUDE.local.md
-.claude/.credentials.json
+**/.claude/settings.local.json
+**/CLAUDE.local.md
+**/.claude/.credentials.json