Fixes scrolling to accurate line numbers when diffing in history

Adds GitService.getWorkingUri
Removes WorkspaceFileExistsRequestType from vsls protocol

Adds a Show All command to the Show More nodes
Improves experience after starting a new search or compare
Fixes issues with maxCount == 0

Reworks file status parsing -- uses consistent regex now

Adds `${committerAgo}`, `${committerAgoOrDate}`, `${committerDate}`
Repurposes `${authorAgo}` & replaces current ones w/ `${author}, ${ago}`
Repurposes `${authorAgoOrDate}` & replaces w/ `${author}, ${agoOrDate}`
Renames defaultDateType to defaultDateSource
Points format settings to new formatting wiki

Fixes #537

Reworks branch parsing to use for-each-ref

Disables commands for the deleted or missing sha
Adds getNextDiffUris & getNextUri
Renames getDiffWithPreviousForFile to getPreviousDiffUris
Renames getPreviousRevisionUri to getPreviousUri

Reworks file status parsing -- uses consistent regex now

Adds getDiffWithPreviousForFile & getPreviousRevisionUri

Adds originalPath token

Adds hovers.changesDiff setting for line vs hunk diff