Add a CodeLens for allowing users to run quick eval

[aeisenberg]

Is your feature request related to a problem? Please describe.

Quick eval is an extremely useful debugging tool, but it is hidden for new users. The idea here is to make this feature more easily discoverable.

Describe the solution you'd like

Use the vscode CodeLens feature. We would annotate all query predicates and allow easy running of quick eval for parts of the QL file.

[aeisenberg]

We need to update the LSP server in order for this to work.

[aeisenberg]

On looking at this deeper, we probably don't need to update the LSP server for the most basic functionality of annotating all predicates so that they are runnable via quick-query.

[adityasharad]

Code Action rather than Code Lens?

[adityasharad]

Oh no looks like Code Lens also lets you have link and other contextual actions.

[shati-patel]

Done in #1035!