chore: stop tracking .claude/ and gitignore it

.claude/settings.local.json is local Claude Code state and was
accidentally published to GitHub. Untrack it and add /.claude/ to
.gitignore so it stays out of future commits.

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

Author: codedeviate

.claude/settings.local.json

@@ -1,2 +1,3 @@
 /target
 /BREW.md
+/.claude/