chore: Add ControlExtensions.Icon support to TextBox

[erikvilima]

GitHub Issue: #1286

PR Type

What kind of change does this PR introduce?

• Bugfix

Description

PR Checklist

Please check if your PR fulfills the following requirements:

• Commits must be following the Conventional Commits specification
• Tested the changes where applicable:
  • UWP
  • iOS
  • Android
  • WASM
  • MacOS
• Updated the documentation as needed:
  • General Doc Update
  • material-controls-styles.md
  • cupertino-controls-styles.md
  • lightweight-styling.md (LightWeight Styling Resource Keys)
• Contains No breaking changes

  If the pull request contains breaking changes, commit message must contain a detailed description of the action to take for the consumer of this library. As explained by the Conventional Commits specification

Other information

Internal Issue (If applicable):

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[Xiaoy312]

why constraint it to TextBox only? the target property accept any Control as recipient?

[kazo0]

But only TextBox supports LeadingIcon/Command/IsVisible, right?

In that case we should probably spit out a warning if someone is trying to set those properties on things other than a TextBox

[erikvilima]

Should I use System.Diagnostics.Debug.WriteLine("...") for the warning?

[erikvilima]

I used d.Log().LogWarning("...")

Uno.Themes/src/library/Uno.Material/Extensions/ControlExtensions.cs

Lines 247 to 253 in fcbeafc

	private static void WarnNotSupportedProperty(DependencyObject d, string propertyName)
	{
	if (d is not TextBox)
	{
	d.Log().LogWarning($"Warning: {propertyName} is only supported on TextBox controls.");
	}
	}

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