[REQ] Add generator for insomnia collection

[MelleD]

Description:

As a user who works extensively with API collections, I would like the ability to generate Insomnia Collections directly from open api , similar to the existing functionality available for Postman Collection generation. This feature would streamline my workflow and save time by allowing me to quickly generate collections for Insomnia without the need for manual conversion or external tools.

See: Postman collection