chore: remove accidental files from tracking, gitignore .claude/ and ._*

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -1,12 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "Bash(git remote:*)",
-      "Bash(git pull:*)",
-      "Bash(git checkout:*)",
-      "Bash(git merge:*)",
-      "Bash(git push:*)",
-      "Bash(git add:*)"
-    ]
-  }
-}

.gitignore

@@ -1,5 +1,9 @@
 # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 
+# Local tooling
+.claude/
+._*
+
 # dependencies
 /node_modules
 /.pnp