[Feature] Enable roaming settings via OneDrive file storage

[shweaver-MSFT]

Describe the problem this feature would solve

Related to #72, RoamingSettings have been deprecated by the Windows platform and there is a need for an alternative.

Describe the solution

Integrate with the RoamingSettings constructs of #72 and #73, and create a new OneDriveDataStore to manage roaming settings via files in OneDrive.

var settings = new RoamingSettings(DataStore.OneDrive);

Additional context & Screenshots

There is a working example in Ambie that we can reference:
https://github.com/jenius-apps/ambie/blob/main/src/AmbientSounds/Services/SyncEngine.cs

[ghost]

Hello shweaver-MSFT, thank you for opening an issue with us!

I have automatically added a "needs triage" label to help get things started. Our team will analyze and investigate the issue, and escalate it to the relevant team if possible. Other community members may also look into the issue and provide feedback 🙌

[ghost]

This issue has been marked as "needs attention 👋" due to no activity for 15 days. Please triage the issue so the fix can be established.

[shweaver-MSFT]

Work is mostly done, lives here: https://github.com/windows-toolkit/Graph-Controls/tree/shweaver/roaming-onedrive

Waiting on the initial RoamingSettings PR to merge before submitting the PR for this.