Add inventory management templates and utility functions

- Created HTML templates for inventory index, layout, search, settings, table, user, and worklog.
- Implemented utility functions for eager loading relationships in SQLAlchemy.
- Added validation mixin for form submissions.
- Updated project configuration files (pyproject.toml and setup.cfg) for package management.

requirements.txt

@@ -1,6 +0,0 @@
-dotenv
-flask
-flask_sqlalchemy
-pandas
-pyodbc
-beautifulsoup4