Update Swagger Docs

[rajdip-b]

Description

Currently, keyshade API uses Swagger to view and manage the API docs. Unfortunately, only the auth module has the proper docs about the API. We would like to add proper documentation to each and every controller in each and every module.

NOTE: This is the master issue. All other linked child issues would require to fulfill the coverage requirements mentioned in this issue.

Checklist

• [ ] Update docs of project module (#83)
• [ ] Update docs of secret module (#85)
• [ ] Update docs of api-keys module (#86)
• [ ] Update docs of envorionment module (#84)

Things to cover

Each of the requests should have the following docs covered:

• Title
• Description.
• Path variables and query parameters.
• All response types along with status, description, and the response body (you may use the swagger UI or your fav API tool for interacting with the API).