Add minimal Flask work form management app

[banti0238-afk]

Why

Provide a tiny local work-form manager so users can track workflow stages, due list, priorities and mark tasks done. This is a self-contained minimal UI useful for local testing and small teams.

What it does

• Adds a new folder work-form-management/ containing a Flask + SQLite app.
• Key files: app.py (Flask app + DB init), templates (base.html, index.html, edit.html), static/style.css, requirements.txt, README.md.
• Tasks support: title, description, workflow_stage, due_date, priority, status. Add/edit/complete/delete flows included.

Implementation notes

• SQLite DB is created at work-form-management/instance/tasks.db on first request.
• DB initialization happens in before_request for simplicity (suitable for local/small usage).
• Commit includes Co-authored-by trailer for the Copilot App.

Testing & running

Run locally:

1. python -m venv .venv
2. ..venv\Scripts\activate
3. pip install -r requirements.txt
4. set FLASK_APP=app.py && flask run

Review focus

• Confirm folder placement and README instructions.
• Suggest improvements: add auth, CSV export, reminders, or background job for notifications (not included).

N/A