feat: add getting notifications endpoint

[izzyjosh]

Related Issue (Link to issue ticket)

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#75

Description

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Getting notifications related to a particular user

Context

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How Has This Been Tested? Screenshots (if appropriate - Postman, etc)

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• Pytest

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Types of changes

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
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Checklist:

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• My code follows the code style of this project.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[vercel]

@izzyjosh is attempting to deploy a commit to the codewitgabi's projects Team on Vercel.

A member of the Team first needs to authorize it.

[codewitgabi]

Provide api test for getting notifications via sse