Feature: `InitializeComponentAttribute`

[Lamparter]

• Closes #62

Add InitializeComponentAttribute feature to the project.

• Attribute Class: Add InitializeComponentAttribute class in src/core/Riverside.Extensions.WinUI/InitializeComponentAttribute.cs.

  • Define InitializeComponentAttribute partial class in Riverside.Extensions.WinUI namespace.
  • Mark the class with [AttributeUsage(AttributeTargets.Class | AttributeTargets.Assembly)].
  • Add a constructor to the class.

• Source Generator: Add source generator for InitializeComponentAttribute in src/core/Riverside.Extensions.WinUI/InitializeComponentAttribute.SourceGenerator.cs.

  • Define InitializeComponentGenerator partial class in Riverside.Extensions.WinUI namespace.
  • Implement ISourceGenerator interface.
  • Implement Initialize method.
  • Implement Execute method to generate the constructor with this.InitializeComponent() for classes with InitializeComponentAttribute.

[Lamparter]

It doesn't work 😕