Add more documentation for how to work with Deno Workspace

[halvardssm]

As the title suggests, I was hoping it would be possible to get some more documentation around the use of deno workspaces?

The current documentation is lacking the following:

• How to import code from other workspaces
  • Say there is a ModuleA and ModuleB in a Deno workspace, how can I import MethodA from ModuleA in ModuleB?
  • How will this translate when deploying the modules to JSR?
• How to run deploy for just one of the modules, or a selected set of modules
• Recommended way of bumping module versions
  • Maybe a subcommand could be introduced that works in the similar way as the script for bumping in std?
  • Alternatively, publish the script for easy usage in other projects that wants to follow the best practices?
• Recommended way to deploy test versions (release candidates) of selected modules (e.g. 0.0.0-rc.1)