Deprecate /self API Endpoints and Provide Meaningful Alternative Routes

[vikasosmium]

Issue Description

Deprecate the /self API endpoint across all routes from the website-backend. And provide a alternative route that will serve the purpose of /self.

Below is the mentioned list of routes where /self is currently being used:

1. • [x] GET /arts/user/self
2. • [ ] GET /extensionRequests/self
3. • [ ] GET /stocks/user/self
4. • [ ] GET /tasks/self
5. • [ ] PATCH /tasks/self/:id
6. • [ ] PATCH /tasks/assign/self
7. • [ ] POST /trading/stock/new/self
8. • [ ] PATCH /users/self
9. • [ ] PUT /users/self/intro
10. • [x] GET /userStatus/self
11. • [ ] PATCH /userStatus/self

Expected Behavior

The API Endpoint should have a more meaningful name.

Current Behavior

Reproducibility

• [x] This issue is reproducible
• [ ] This issue is not reproducible

Severity/Priority

• [ ] Critical
• [x] High
• [ ] Medium
• [ ] Low

Additional Information

Checklist

• [x] I have read and followed the project's code of conduct.
• [x] I have searched for similar issues before creating this one.
• [x] I have provided all the necessary information to understand and reproduce the issue.
• [x] I am willing to contribute to the resolution of this issue.

[vikasosmium]

Can you please assign this issue to me? @vinit717