Fixes #15571

Fixes #15134

Fixes #13305

Part of #13305

The function is necessary as it deleted the folder. This is used to
see if there are backups available on the main side

Fixes #14056

Since text files in workspaces are now restored using the regular workspace
restore code and models check when opened if there is a backup available,
the registration and deregistration of workspace resources is no longer
necessary.

Fixes #14064

Fixes #14074

Fixes #14066

This change does the following:
- filesToRestore are no longer checked at all, instead the the already existing
  editorStacks.model value from local storage restores the files just like
  normal.
- Loading of the resource is now solely the responsibility of
  TextFileEditorModel, removing a lot of the stuff being passed down through
  the layers.

Fixes #14100
Fixes #14067

Fixes #14068

Also clean up shutdown logic to fix issue where backup workspaces were not
being evicted from workspaces.json.

The dep can't be fulfilled on main process

jsdoc was only added for the renderer side interface as they will soon
be merged together.