fix: add System.Reactive.Disposables.Fluent namespace and fix RS2005 analyzer warning

- Add using System.Reactive.Disposables.Fluent to TestViewModel.cs (DisposeWith moved there in System.Reactive 6.1.0)
- Fix duplicate RXUISG0018 entries in AnalyzerReleases.Shipped.md (merge into single entry)

Build completes with 0 errors, 0 warnings. All 33 tests pass on net8.0, net9.0, and net10.0.

Co-authored-by: glennawatson <[email protected]>

Author: Copilot

src/ReactiveUI.SourceGenerators.Execute/TestViewModel.cs

@@ -8,6 +8,7 @@
 using System.Reactive;
 using System.Reactive.Concurrency;
 using System.Reactive.Disposables;
+using System.Reactive.Disposables.Fluent;
 using System.Reactive.Linq;
 using System.Reactive.Subjects;
 using System.Runtime.Serialization;

src/ReactiveUI.SourceGenerators.Roslyn/AnalyzerReleases.Shipped.md

@@ -20,8 +20,7 @@ RXUISG0013 | ReactiveUI.SourceGenerators.ObservableAsPropertyGenerator | Error |
 RXUISG0014 | ReactiveUI.SourceGenerators.ObservableAsPropertyGenerator | Error | See https://www.reactiveui.net/docs/handbook/view-models/boilerplate-code.html
 RXUISG0015 | ReactiveUI.SourceGenerators.ReactiveGenerator | Error | See https://www.reactiveui.net/docs/handbook/view-models/boilerplate-code.html
 RXUISG0017 | ReactiveUI.SourceGenerators.ObservableAsPropertyFromObservableGenerator | Error | See https://www.reactiveui.net/docs/handbook/view-models/boilerplate-code.html
-RXUISG0018 | ReactiveUI.SourceGenerators.ObservableAsPropertyFromObservableGenerator | Error | See https://www.reactiveui.net/docs/handbook/view-models/boilerplate-code.html
-RXUISG0018 | ReactiveUI.SourceGenerators.ReactiveGenerator | Error | See https://www.reactiveui.net/docs/handbook/view-models/boilerplate-code.html
+RXUISG0018 | ReactiveUI.SourceGenerators.ObservableAsPropertyFromObservableGenerator/ReactiveGenerator | Error | See https://www.reactiveui.net/docs/handbook/view-models/boilerplate-code.html
 RXUISG0019 | ReactiveUI.SourceGenerators.BindableDerivedListGenerator | Error | See https://www.reactiveui.net/docs/handbook/view-models/boilerplate-code.html
 
 ## Rules
@@ -78,11 +77,8 @@ This rule checks if there are any Properties to change to Reactive Field, change
 - RXUISG0017 - ObservableAsPropertyFromObservableGenerator
 This rule checks if the `ObservableAsProperty` has Invalid generated property declaration.
 
-- RXUISG0018 - ObservableAsPropertyFromObservableGenerator
-This rule checks if the `ObservableAsProperty` has Invalid class inheritance, must inherit from `ReactiveObject`.
-
-- RXUISG0018 - ReactiveGenerator
-This rule checks if the `Reactive` has Invalid class inheritance, must inherit from `ReactiveObject`.
+- RXUISG0018 - ObservableAsPropertyFromObservableGenerator/ReactiveGenerator
+This rule checks if the `ObservableAsProperty` or `Reactive` has Invalid class inheritance, must inherit from `ReactiveObject`.
 
 - RXUISG0019 - BindableDerivedListGenerator
 - This rule checks if the `BindableDerivedList` has Invalid property inheritance type.