Add list and detail serializer and tests for prescription module

[GeekGawd]

Proposed Changes

• Add list and detail serializer for prescription module.
• Add tests for prescription module.

Associated Issue

• Fixes prescription.py in https://github.com/coronasafe/care_fe/issues/5492

Merge Checklist

• [x] Tests added/fixed
• [x] Linting Complete

Only PR's with test cases included and passing lint and test pipelines will be reviewed

@coronasafe/care-backend-maintainers @coronasafe/care-backend-admins