[FEATURE] Add documentation comments in crate hyperswitch interface

[deepanshu-iiitu]

Feature Description

Add comments in crate hyperswitch interface.

Possible Implementation

Add comments in crate hyperswitch interface.

Have you spent some time checking if this feature request has been raised before?

• I checked and didn't find a similar issue

Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to submit a PR?

None