fix: correct docstring syntax error and update gitignore

- Fix escaped quotes in post_gen_project.py docstring
- Add run_in_env.sh helper script to gitignore
- Helper script provides easy access to micromamba environment

Author: yibeichan

.gitignore

@@ -167,3 +167,6 @@ internal/
 # Temporary files
 .ui_checksum_cache
 selected_activities.json
+
+# Development helper scripts
+run_in_env.sh

hooks/post_gen_project.py

@@ -164,7 +164,8 @@ def setup_pre_commit(optional=True):
 
 
 def main():
-    \"\"\"Main function to handle post-generation setup.\"\"\"\n    base_path = os.getcwd()
+    """Main function to handle post-generation setup."""
+    base_path = os.getcwd()
     init_flag_path = os.path.join(base_path, ".initialized")
 
     # Check if the project has been initialized before