se-dev-plugin

Do the one-time preparation steps described in `Prepare.md`, but only if the `Prepare.DONE` file is missing.

How to build custom tool script to conduct search and for other tasks:
- A Python virtual environment in this folder was made available by the preparation.
- Use this Python virtual environment to write short, targeted, reusable utility scripts as needed. 
  Build a catalog of such scripts in `UtilityScripts.md` next to this skill file.