Adds @command decorator
Changes (fetch|pull|push)All to be cancelable

Adds a static "container"
Adds a document tracker - replaces the context tracker
Adds a line tracker
Refactors all the things - better performance, lower overhead, less code, more separation of concerns, more maintainable (hopefully)
Changes dirty blame to only happen after a "idle" delay
Closes open file annotations on edit (too expensive to track changes)

Renames quickpicks/quickpicks to quickpicks/common
Moves git quick picks into common and other quick pick files

Refactored commands and blame annotations