Updates GitLens logo
Adds CodeStream sponsor

- Surround `😄` with code backticks, as this gets parsed in GitHub.

Adds branch markers to all commit lists

Changes Open All Changes (w difftool) to open files, rather than dirdiff
Changes Open All Changes (w difftool) to prompt for repo when needed

Changes changelog image links to permalinks
Moves all images for docs into a docs folder
Removes unused images

Renanes "Compare x with" commands

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

Removes gitlens.advanced.git setting

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

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

Also allows for vscode undo support for the applied changes