Support TreeView extension

[alefragnani]

A new panel with projects and details.
Depends on microsoft/vscode#15485

[rfgamaral]

This is great news, would love to see this get implemented :)

For me, a simple list of projects that you could open (with a double-click perhaps) with the title and the system path location of the project displayed would suffice. Similar to Sublime Text's project switcher, but in the activity bar panel :)