FancyZones: allow deploying layouts (custom layouts, templates, hotkeys, default layouts) through Microsoft DSC

Description of the new feature / enhancement

Since #49427, PowerToys.DSC.exe can deploy Keyboard Manager remappings through the Microsoft.PowerToys/KeyboardManagerProfile resource. FancyZones has the same gap: the Microsoft.PowerToys/FancyZonesSettings resource only manages the settings in settings.json (activation, appearance, behavior), while the layouts themselves are stored in separate files under %LOCALAPPDATA%\Microsoft\PowerToys\FancyZones\ and can only be created in the FancyZones editor:

• custom-layouts.json (canvas and grid layouts)
• layout-templates.json (zone count and spacing of the built-in templates)
• layout-hotkeys.json (quick layout switch keys)
• default-layouts.json (layouts applied to new horizontal and vertical monitors)

Scenario when this would be used?

• Setting up a new developer machine with winget configure, including the window layouts and the quick layout hotkeys, without opening the FancyZones editor.
• Keeping a fleet of machines on a standard set of layouts with dsc config set, and detecting drift with dsc config test.
• Exporting the layouts of a reference machine with PowerToys.DSC.exe export and reusing them in a configuration document.

Supporting information

No response

Start by reviewing the existing Keyboard Manager DSC resource from #49427 and the Microsoft.PowerToys/FancyZonesSettings resource, then trace how FancyZones reads custom-layouts.json, layout-templates.json, layout-hotkeys.json, and default-layouts.json. Done means DSC can deploy, export, and test drift for these layout files without opening the FancyZones editor.