Fluent UX: FanzyZones Editor

[niels9001]

The FanzyZones editor doesn't respect dark theme and could use a Fluent update to make it feel more native to Windows.

Main screens/controls that need to be updated:

• Choose your layout dialog
• Custom layout created dialog
• Resizable zone control

Can we move for the first 2 dialogs to XAML Islands/WinUI 3.0 so we can get the latest styling? Probably overkill for 'Resizable zone control'.

@zeealeid's did a nice mock-up previously that could be of inspiration:

[enricogior]

Hi @niels9001
we are planning a major redesign (see #1032) for the editor in terms of functionality and UX, your input on the UI would be great, I was actually planning to ask you for suggestions!

[niels9001]

@enricogior Is there an active branch for this already? If that's in place + XAML Island logic we can get started based on @crutkas draft spec (https://github.com/microsoft/PowerToys/blob/dev/crutkas/FzEditor2Spec/doc/specs/FancyZoneEditorV2.md)?

[enricogior]

No, we don't have an active branch yet. We plan to start working on it this upcoming week.

[crutkas]

can we track this in #1032?