[SAMPLE] Smart Text Box control

[zateutsch]

fixes #131

Added smart text box control sample.

[nmetulev]

Works great. Only suggestion here is make sure that using ctrl + a to select all text should also invoke the flyout.

[Copilot]

Copilot reviewed 2 out of 6 changed files in this pull request and generated 2 comments.

Files not reviewed (4)

• AIDevGallery/App.xaml: Language not supported
• AIDevGallery/Samples/Open Source Models/Language Models/SmartText.xaml: Language not supported
• AIDevGallery/Samples/SharedCode/SmartTextBox.xaml: Language not supported
• AIDevGallery/Samples/scenarios.json: Language not supported

Comments suppressed due to low confidence (1)

AIDevGallery/Samples/SharedCode/SmartTextBox.cs:243

• Using Task.Run is unnecessary and can be simplified to just await DescribeChanges(textToChange, changes);

return await Task<string>.Run(async () =>