Feature Request: Collect User Feedback

[subzero10]

Similar to the ruby and php packages, we want to bring the Collect User Feedback feature in the JS package as well.

Additionally, we should update the Client Library Spec to include the documentation necessary to implement this feature on client libraries.

Originally requested from a user: https://app.frontapp.com/open/msg_1dhuw9up

[subzero10]

@joshuap I started looking into this and I'm wondering if I should create feedback forms/components for specific js frameworks, such as vue and react, since similar was done for the PHP package (Laravel) or for Ruby (Rack).
What do you think?
Or should I do something generic in the js package?
Or both ?

Edit:
I'm still thinking over this. I'm looking at this feature from other vendors and gathering ideas. I will post here updates when I have a more concrete idea on the implementation details.