Add support for multiple workspaces

[jack1902]

Similar to how Insomnia lays out multiple pre-defined requests. Provide the ability to have requests sit on their own, or be grouped within a folder.

This is a major usability piece as working on multiple endpoints over time will get very tedious to keep updated Wombat

[rogchap]

Thanks for raising. Yes, I plan on adding support for Workspace switching.

Just an FYI: In my environment I have lots of gRPC microservices; so I use Envoy (with docker-compose) to act as a proxy to all the services via one address and just setup some routes to the other services in the envoy config. This way I can bring all my services into the default workspace (just an idea for you).