* chore: add /v2 to import module path
go mod requires semantic versioning with versions greater than 1.x
This was a mechanical update by running:
```
go install github.com/marwan-at-work/mod/cmd/mod@latest
mod upgrade
```
Migrate generated files to import /v2
* Fix gen
* fix: Remove unused workspace routes in favor of list with filter
This consolidates the workspace routes into a single place.
It allows users to fetch a workspace by their username and
workspace name, which will be used by the frontend for routing.
* Fix RBAC
* Fix CLI usages
This changes all "coder workspace *" commands to root.
A few of these were already at the root, like SSH. The
inconsistency made for a confusing experience.