Closes #470 - Adds fetch command to Repository explorer

Closes #354 - Adds line history explorer (wip)
Closes #456 - Adds repository status to the repository nodes

Updates dependencies

Replaces git content provider with git fs provider
Adds Buffer output support to git calls

Adds new ${changes} and ${changesShort} template tokens
Adds support for prefixes and suffixes around tokens
Fixes missing/mismatched token option issues

Renanes "Compare x with" commands

Fixes #405 - stops non-repo from showing up in explorer

Removes Uri monkey patch as it no longer will work
See 03432806c8
Stops encoding uris in .toString calls

Removes gitlens.advanced.git setting

Removes start logging from isTracked

Changes rebase & reset terminal commands to apply to all commit nodes

Consolidates ui dependencies & build into main

Adds clearing of the user cache on config change
Fixes lint issues and adds some comments

Fixes #457: incorrect displayed username `You`

To allow greater flexibility in how versioned files are implemented