User Story: Category Model

[DarrachBarneveld]

As a developer, I can create data model classes for categories so that structure my data effectively develop relationships between each type

Acceptance Criteria:

1. Each model is planned out with necessary fields
2. Each model is named according to its function
3. Model relationships are clearly stated with FK or M2M relationships

Tasks

• [x] Create a categories model
• [x] List all necessary fields
• [x] Create custom methods if required
• [x] Define its str name

[DarrachBarneveld]

Category model created and admin register configured