added backslashes at the end of each route in api.ts

[Marmik2003]

fixes #2580

[rithviknishad]

@Marmik2003 deploy preview is failing. merge the latest develop branch.

[Ashesh3]

I feel not all endpoints in api.ts need a trailing slash, and adding it in some cases will cause malfunction.

For instance, Updating a Facility fails with this change. This is because of the way fireRequest works.

export const fireRequest = (
...
    if (path.length > 0) {
      request.path += "/" + path.join("/");
    }
...

Adding a trailing slash to updateFacility key in the api.ts would lead to the final URL being:
http://localhost:4000/api/v1/facility//4a3dbe9c-8d1b-4dc1-b939-237d79d96233
(Notice the double slash there).

Which obviously errors out:

Some endpoints in api.ts are to be without end slashes for the above reason.

I believe this issue would be resolved better with this PR: #2395
This is because the mentioned PR modifies how fireRequest works and just adds a trailing slash on the fly whenever and only when its necessary.