PACKAGE: Add more `auth` endpoints across `schema` and `api-client` packages.

[rajdip-b]

Description

We need to add these two endpoints to the schema and api-client packages:

• https://github.com/keyshade-xyz/keyshade/blob/210c0fdbf1ac815a8f7878e98b604c616d6fdd73/apps/api/src/auth/controller/auth.controller.ts#L41-L48
• https://github.com/keyshade-xyz/keyshade/blob/210c0fdbf1ac815a8f7878e98b604c616d6fdd73/apps/api/src/auth/controller/auth.controller.ts#L61-L69

Solution

• Add the request and response schemas in the schema package
• Add relevant tests in the schema package
• Add the controller implementation in api-client package
• No tests needed in the api-client package for these two requests