feat(api): add external API endpoint for getting urls

[halfwhole]

Problem

We want to add an external API endpoint for getting URLs (GET /api/v1/urls)

See Notion page on external API

Solution

Added the getUrlsWithConditions method to ApiController for getting URLs. (This is modelled after the getUrlsWithConditions method in UserController)

Improvements:

• Query conditions allows tags to be undefined as well (as would be the case in the API controller)
• Strengthened the query param validations in userUrlsQueryConditions compared to the one in the user controller; these query params are also now validated before hitting the API controller
  • limit: optional integer from 0 to 1000
  • offset: optional non-negative integer
  • orderBy: optional, removed updatedAt as an option, allow only createdAt and clicks. Is this ok?
  • searchText: optional, converted to lowercase by Joi before being passed to controller
  • state: optional, either active or inactive - similar to fix: restrict state to active and inactive in url search #2050
  • isFile: optional boolean

Possible future improvements:

• Disable eslint newline-per-chained-call - it conflicts with prettier!
• Similarly, we can strengthen query param validations in the user controller

Tests

• Unit tests for API controller

Should write integration tests too, when we have them