Replace local Result types with Kebechet.Types.Result package

[Kebechet]

The Result and Result<TError> types in Models/Result.cs have been extracted into a standalone NuGet package: Kebechet.Types.Result 1.0.0.

The package additionally introduces DataResult<TValue> and DataResult<TValue, TError> for value-carrying outcomes that don't need a per-operation subclass.

Migration steps

1. Add the package reference to src/Maui.Health/Maui.Health.csproj:

   <PackageReference Include="Kebechet.Types.Result" Version="1.0.0" />

2. Delete src/Maui.Health/Models/Result.cs.
3. Update using directives in files that reference Result / Result<TError> — replace using Maui.Health.Models; with using Types.Result; (or add the latter alongside the former where other types from Models are also used).
4. Verify the consuming subclasses still compile. Affected files (each derives from Result or Result<TError>):
   • Models/ChangesTokenResult.cs
   • Models/ChangesReadResult.cs
   • Models/AggregatedReadResult.cs
   • Models/AggregatedIntervalReadResult.cs
   • Models/HealthRecordReadResult.cs
   • Models/HealthDataReadResult.cs
   • Models/HealthRecordResult.cs (ReadRecordResult)
   • Models/RequestPermissionResult.cs
   • Models/UpdateHealthDataResult.cs
   • Models/WriteHealthDataResult.cs
   • Models/WorkoutReadResult.cs
5. Update Platforms/Android/Extensions/ContextExtensions.cs (uses new Result<SdkStatus>()).
6. Build and run tests.

Notes

• The package's public API is identical to the in-repo types (same property names, same XML semantics for IsSuccess / Error / ErrorException), so derived classes need no behavioral changes.
• The package targets net6.0 through net10.0, so all current Maui.Health TFMs are covered.
• dont expose it to consumer of the library if possible