Create a simple model of a flask api

[GabrielF9]

Description

My PR includes a flask_api_model.py file that is a simple way to do a flask api.

Type of change

• [x] New feature (non-breaking change which adds functionality)

Checklist:

• [x] I have read the contribution guidelines before making this PR.
• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented in my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation (Language folder or any other readme instructed to)
• [x] My changes generates no new warnings