chore: remove temp artifacts and add to gitignore

Remove 6 tmpclaude-*-cwd files and test-write.txt from tracking.
Add patterns to .gitignore to prevent future commits.

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

Author: Mnehmos

.gitignore

@@ -46,6 +46,8 @@ yarn-error.log*
 # Temporary files
 tmp/
 temp/
+tmpclaude-*
+test-write.txt
 
 # Binaries and build artifacts
 bin/