Replace generic Error with TypeError in formatDate

To locate the issue, go to frontend/src/utils/dateFormatter.ts.
The formatDate function performs a type check and throws a generic Error when the input cannot be parsed into a valid Date.

Sonar issue reference:
https://sonarcloud.io/project/issues?impactSeverities=LOW&issueStatuses=OPEN%2CCONFIRMED&id=OWASP_Nest&open=AZlyHYW3SEbp2GJiJGDK

@arkid15r @kasya
I would like to take this up as a good first issue. Fixing this small issue will also help me understand the project’s contribution workflow.
please assign this to me. Thanks you