Fixes #17

Description

Created Mentee model under users app and generated migrations for the app

Type of Change: (Delete irrelevant options)

• Code

Code/Quality Assurance Only (Delete irrelevant options)

• New feature (non-breaking change which adds functionality pre-approved by mentors)

How Has This Been Tested?

Describe the tests you ran to verify your changes. Provide instructions or GIFs so we can reproduce. List any relevant details for your test.

Checklist:

• My PR follows the style guidelines of this project
• I have performed a self-review of my own code or materials
• I have commented my code or provided relevant documentation, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged
• Update Swagger documentation and the exported file at /docs folder
• Update requirements.txt

Code/Quality Assurance

• My changes generate no new warnings
• My PR currently breaks something (fix or feature that would cause existing functionality to not work as expected)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been published in downstream modules