Until the VS Code marketplace can truly handle pre-releases we can't adopt the current limited pre-release provided by VS Code

Fixes #2177, fixes #2185, fixes #2180, fixes #2179

Avoids dangerous `any` cast when setting FileNode parent in FolderNode

I've disabled the refresh to show the spinner icon on the root node to avoid this issue until I can dig into this more. It looks like this is a bug in the VS Code tree view.

Until we can dynamically update the Graph when scrolled into view

Adds extra HEAD check to avoid extra lookup

Deprecates Insiders extension

Adds additional logging

- avoids mutating subscriptions

Co-authored-by: Eric Amodio <eamodio@gmail.com>