- adds command palette action

Adds line fading option to heatmap annotation

And separates the existing Gerrit provider to a new GoogleSource one.

Closes #1953

Honors `git.repositoryScanMaxDepth` if not overridden

Adds a "system" option to follow the system locale

Adds associated PRs to worktree branches
Adds worktrees to the settings page
Adds unpublished markers to worktrees

Aligns terminology with other commands

Updates CHANGELOG

Updates CHANGELOG

Updates .command and other args in README
Updates contributors

Updates CHANGELOG