VSCode snippets for integration tests

Idea: Generate snippets with common component tests patterns

* Test with when-then + AAA
* nock verify outgoing payload
* Assert HTTP response
* Describe with API verbs (/api + describe for POST, GET, DELETE)
* Randmoize unique value
* Axios request with token
* Example of basic test which assert the response
* Example of basic test which asserts the existing state
* Example of basic test which asserts outgoing call
* Others?