Add .egg-info directories to .gitignore

Depending on how the user has set up their local development environment,
they may have generated custom-components.egg-info etc directories.

PR #2747

.gitignore

@@ -1,6 +1,7 @@
 /.idea/
 /.vscode/
 /.env/
+/*.egg-info/
 __pycache__/
 .pytest_cache/
 /config/