Feature request: Support workflows in query builders

[akphi]

Query builder might be used in different workflows right now:

• Data browsing mode: the current query builder where the query is expected to be of shape SomeClass.all()...
• Advanced/Unsupported mode: the query can be of any form

As such, we come up with this idea to add a new feature to the query builder - workflows. Think of Adobe Photoshop workspace feature: you can pick the flow that works best for you - Illustration, Photography, etc.

Implementation Plan

• Add new feature: Workflow
  • Workflow bundles plugins together and there should be a generic check for when workflow is applicable and instruction on what happens when switching between workflows
  • Add the workflows as mentioned in the previous section
  • Workflow can also take a config to show/hide elements: hide result panel, etc.

[akphi]

I have updated the implementation plan in more details in #1453