feat: base flask resources for python

[Darkflame72]

This is a complete rewrite of all the Flask resources. This is based on feedback from schools and staff on delivery as the previous resources were too condensed and unable to be delivered over several sessions with a lot of boilerplate.

Goals of the new resources:

• Small modules
• Always able to see output without lots of writing
• Starts simple
• Based on best practices

The main guide on using Flask has been split into sections inside of the guides/python/flask section.

guides/python/flask

• [x] Introduction to Flask
• [x] Getting started with routes
• [x] Using Flask Templates
• [x] Updating data
• [x] Serving static files
• [x] Adding in a database
• [x] Simplifying with Blueprints
• [x] Doing it all as an app
• [x] Writing automated tests
• [ ] Authentication
• [ ] Proper form handling with WTForms
• [x] Database handling with SQLAlchemy

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[Darkflame72]

This is going to be merged with auth and testing still to be done which will be other PRs