Adds new command to toggle CodeLens on and off when `gitlens.codeLens.visibility` is set to `ondemand`

Adds new blame annotation styles (compact & expanded)
Cleaned up blame annotations
Fixes issue with invalid repoPath on first start

Automatically turns off blame only when required now

Removes CodeLens from fields and single-line properties to reduce visual noise

Adds diff menu commands always
Attempts to move the diff file to the correct line number
Fixes code action provider -- works again
Deletes deprecated code

Reworked Uri scheme to drastically reduce encoded data (big perf improvement)