chore: gitignore playwright-mcp working dir and screenshots

Claude-Session: https://claude.ai/code/session_01UjSKLDquR9hJa3Dg6dJKxi

Author: camilleislasse

.gitignore

@@ -36,4 +36,6 @@
 /.vscode/
 
 # Claude Code
-/.claude/
+/.claude/
+.playwright-mcp/
+*.png