Bindable property for camera view

[ne0rrmatrix]

This pull request refactors the way bindable properties are declared and implemented in the CameraView class, moving from manual property and backing field declarations to using the [BindableProperty] attribute for automatic generation. This modernizes the codebase, reduces boilerplate, and makes the property definitions more concise and maintainable. Additionally, a project reference is added for source generators, and some minor code cleanups are performed.

Key changes include:

Bindable Property Refactoring:

• Replaced manual declaration of bindable properties in CameraView (such as IsAvailable, CameraFlashMode, IsTorchOn, etc.) with the [BindableProperty] attribute, allowing source generators to auto-generate the necessary code. This change significantly reduces boilerplate and improves maintainability.
• Removed the corresponding explicit property implementations and backing fields for these bindable properties, as they are now generated automatically.

Project and Code Cleanup:

• Added a project reference to CommunityToolkit.Maui.SourceGenerators.Internal as an analyzer in the .csproj file, enabling the use of source generators for bindable properties.
• Removed unnecessary public modifier from the CameraViewDefaults class, making it internal to the assembly.
• Cleaned up unused using directives in CameraView.shared.cs. ### Description of Change ###

PR Checklist

• Has a linked Issue, and the Issue has been approved(bug) or Championed (feature/proposal)
• Has tests (if omitted, state reason in description)
• Has samples (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Changes adhere to coding standard
• Documentation created or updated: https://github.com/MicrosoftDocs/CommunityToolkit/pulls

Additional information

This is blocked until #2933 merges. It requires support for BindableProperties.CreateReadOnly which is introduced in that PR. See here: https://learn.microsoft.com/en-us/dotnet/api/microsoft.maui.controls.bindableproperty.createreadonly?view=net-maui-10.0

[Copilot]

Pull request overview

This PR modernizes the CameraView class by refactoring manual bindable property declarations to use the [BindableProperty] attribute with source generators, significantly reducing boilerplate code. The changes include adding source generator support, updating property definitions to use attributes, removing redundant property implementations, and adjusting the visibility of the CameraViewDefaults class to internal.

Key changes:

• Replaced manual BindableProperty.Create and BindableProperty.CreateReadOnly calls with [BindableProperty] attributes for all properties in CameraView
• Added project reference to CommunityToolkit.Maui.SourceGenerators.Internal as an analyzer
• Changed CameraViewDefaults visibility from public to internal, as it's marked with [EditorBrowsable(EditorBrowsableState.Never)]

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 13 comments.

File	Description
src/CommunityToolkit.Maui.Camera/Views/CameraView.shared.cs	Refactored all bindable properties to use [BindableProperty] attributes, removed manual property implementations, and cleaned up unused using directives
src/CommunityToolkit.Maui.Camera/Primitives/CameraViewDefaults.shared.cs	Changed class visibility from public to internal to properly hide implementation details
src/CommunityToolkit.Maui.Camera/CommunityToolkit.Maui.Camera.csproj	Added source generator project reference as an analyzer to enable automatic bindable property generation

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[TheCodeTraveler]

Thanks James!

Just FYI - I fixed the XML docs and moved <EmitCompilerGeneratedFiles> to Directory.Build.props to avoid us duplicating it in every .csproj file