API Documentation and Revision of Endpoint Naming

[GPropersi]

Mainly contains API documentation detailing the request and response data needed from all currently-generated API endpoints.

Camel case is assumed when dealing with JavaScript, while snake case is used while dealing with Python.

Exception includes the csrf_token, which must be labeled as such due to WTForms library. In general, this field is not included since most requests are completed via AJAX, which requires the X-CSRFToken HTTP header instead of the csrf_token field.

Other fixes include:

• Alterations to test running
• Naming conventions for endpoints changed to match documentation
• Allowing custom host/port designations based on environment variables
• Renaming users to members when dealing with members of UTubs
• Type hints added to much of Python code
• Alterations to responses for some endpoints, including add_member
• Rearranging splash page JavaScript to be called when a modal form is requested (i.e. login form, register form)
• Including use strict for splash page JavaScript
• Fully making use of bootstrap 5 to perform modal functions
• Automatically sending an email validation email after a user has registered
• Making sure navbar and splash page 'works' on mobile
• Created callable route strings in Python code
• Modularizing the string used in Python code based on topic
• Attempts at fixing URL validation for websites requiring strict user agents
• Separate tests into specific folders based on topic
• Parallelize tests in github workers, and change workflow names to match their action

Closes #173