Edit .gitignore file to add zed editor configurations (#4483)

Author: raunakab

Diff for: .gitignore

@@ -1,13 +1,25 @@
-.env
+# editors
+.vscode
+.zed
+
+# macos
 .DS_store
+
+# python
 .venv
 .mypy_cache
 .idea
-/deployment/data/nginx/app.conf
-.vscode/
-*.sw?
-/backend/tests/regression/answer_quality/search_test_config.yaml
+
+# testing
 /web/test-results/
 backend/onyx/agent_search/main/test_data.json
 backend/tests/regression/answer_quality/test_data.json
-jira_test_env/
+
+# secret files
+.env
+jira_test_env
+
+# others
+/deployment/data/nginx/app.conf
+*.sw?
+/backend/tests/regression/answer_quality/search_test_config.yaml