Add clipboard support for e2e tests

[bafonins]

Summary

We should add an easy way to access clipboard in cypress e2e tests.

Why do we need this?

At least to test API key creation to verify that the user can copy the created key since after closing the modal there is no other way to retrieve the key.

What is already there? What do you see now?

Nothing regarding clipboard support in e2e tests

What is missing? What do you want to see?

Cypress command or an utility function to read from user clipboard.

How do you propose to implement this?

Consider trying suggestions in this issue

How do you propose to test this?

Run cypress with clipboard support added

Can you do this yourself and submit a Pull Request?

yes