* Adds the GcodeThumbnailProvider
* Registers the GcodeThumbnailProvider
* Adds Settings support
* Reverts solution changes back to original
* Corrects "Gcode" text with "G-code"
* Adds gcode thumbnail setting description
* Follow up on PR review comments
* Adds GcodePreviewHandler
* Follow up on PR review comments
* Renames assemblies following #14903