Migrate away from dedicated Aurelia tab to original approach of using Elements view and Aurelia tab #16

We currently maintain a separate Aurelia tab which introduces friction. Developers start in the Elements view and it already does a good job of keep tracking of things and we also have an Aurelia panel in the Elements view too. Someone raised this a little while ago and initially the dedicated Aurelia panel was intended to be more diagnostic purposes and whatnot, but for what we want it to be it makes sense to just use the Elements view. The original attempt was copying other extensions like the React devtools.

• Remove top level Aurelia tab and de-duplicate logic
• Clean up existing tests/components
• Create dedicated new sidebar app for the extension to use in the Elements panel
• Make Aurelia inspector tab show for all elements, not just found elements and avoid traversal closest Aurelia parent logic
• Allow quick searching for components and click to view in DOM
• Speed up detection logic
• Component hierarchy
• Add e2e tests
• Revise existing unit tests
• Ensure it works for both Aurelia 1 and Aurelia 2 apps