[feat] Add Linux core dump to .gitignore

Ignore ./core files to prevent Linux core dumps from being committed.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: snomiao

.gitignore

@@ -61,5 +61,8 @@ dist.zip
 # Temporary repository directory
 templates_repo/
 
-# Vite’s timestamped config modules
+# Vite's timestamped config modules
 vite.config.mts.timestamp-*.mjs
+
+# Linux core dumps
+./core