Remove tgz file and add to gitignore

- Remove accidentally committed mdtail-1.0.0.tgz package file
- Add *.tgz to .gitignore to prevent future package files from being committed

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

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

Author: super3

.gitignore

@@ -4,4 +4,5 @@ coverage/
 *.log
 .env
 .vscode/
-.idea/
+.idea/
+*.tgz