docs: Add XML documentation to DotNetExtensions, GitExtensions, and BooleanExtensions (#1671)

Add comprehensive XML documentation to extension classes:
- DotNetExtensions: Document class, registration methods, and context accessors
- GitExtensions: Document class, registration methods, and context accessor
- BooleanExtensions: Document class and AsSkipDecisionIfTrue method

Fixes #1590
Fixes #1575

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: thomhurst

src/ModularPipelines.DotNet/Extensions/DotNetExtensions.cs

@@ -9,9 +9,16 @@
 
 namespace ModularPipelines.DotNet.Extensions;
 
+/// <summary>
+/// Provides extension methods for integrating .NET CLI functionality into the ModularPipelines framework.
+/// </summary>
 [ExcludeFromCodeCoverage]
 public static class DotNetExtensions
 {
+    /// <summary>
+    /// Automatically registers the .NET context services with the ModularPipelines framework.
+    /// This method is called by the module initializer and should not be called directly.
+    /// </summary>
 #pragma warning disable CA2255
     [ModuleInitializer]
 #pragma warning restore CA2255
@@ -20,6 +27,12 @@ public static void RegisterDotNetContext()
         ModularPipelinesContextRegistry.RegisterContext(collection => RegisterDotNetContext(collection));
     }
 
+    /// <summary>
+    /// Registers .NET CLI services with the dependency injection container.
+    /// This includes services for running dotnet commands such as build, test, pack, publish, and NuGet operations.
+    /// </summary>
+    /// <param name="services">The service collection to add the .NET services to.</param>
+    /// <returns>The service collection for method chaining.</returns>
     public static IServiceCollection RegisterDotNetContext(this IServiceCollection services)
     {
         services.TryAddScoped<ITrxParser, TrxParser>();
@@ -43,7 +56,19 @@ public static IServiceCollection RegisterDotNetContext(this IServiceCollection s
         return services;
     }
 
+    /// <summary>
+    /// Gets the .NET CLI service from the pipeline context.
+    /// This provides access to dotnet commands such as build, test, pack, publish, and more.
+    /// </summary>
+    /// <param name="context">The pipeline hook context.</param>
+    /// <returns>The <see cref="IDotNet"/> service for executing .NET CLI commands.</returns>
     public static IDotNet DotNet(this IPipelineHookContext context) => context.ServiceProvider.GetRequiredService<IDotNet>();
 
+    /// <summary>
+    /// Gets the TRX (Test Results XML) parser service from the pipeline context.
+    /// This provides access to parse and analyze .NET test result files.
+    /// </summary>
+    /// <param name="context">The pipeline hook context.</param>
+    /// <returns>The <see cref="ITrx"/> service for parsing TRX test result files.</returns>
     public static ITrx Trx(this IPipelineHookContext context) => context.ServiceProvider.GetRequiredService<ITrx>();
 }

src/ModularPipelines.Git/Extensions/GitExtensions.cs

@@ -7,9 +7,16 @@
 
 namespace ModularPipelines.Git.Extensions;
 
+/// <summary>
+/// Provides extension methods for integrating Git functionality into the ModularPipelines framework.
+/// </summary>
 [ExcludeFromCodeCoverage]
 public static class GitExtensions
 {
+    /// <summary>
+    /// Automatically registers the Git context services with the ModularPipelines framework.
+    /// This method is called by the module initializer and should not be called directly.
+    /// </summary>
 #pragma warning disable CA2255
     [ModuleInitializer]
 #pragma warning restore CA2255
@@ -18,6 +25,12 @@ public static void RegisterGitContext()
         ModularPipelinesContextRegistry.RegisterContext(collection => RegisterGitContext(collection));
     }
 
+    /// <summary>
+    /// Registers Git services with the dependency injection container.
+    /// This includes services for running Git commands and accessing repository information.
+    /// </summary>
+    /// <param name="services">The service collection to add the Git services to.</param>
+    /// <returns>The service collection for method chaining.</returns>
     public static IServiceCollection RegisterGitContext(this IServiceCollection services)
     {
         services.TryAddScoped<IGit, Git>();
@@ -29,5 +42,11 @@ public static IServiceCollection RegisterGitContext(this IServiceCollection serv
         return services;
     }
 
+    /// <summary>
+    /// Gets the Git service from the pipeline context.
+    /// This provides access to Git commands and repository information.
+    /// </summary>
+    /// <param name="context">The pipeline hook context.</param>
+    /// <returns>The <see cref="IGit"/> service for executing Git commands and accessing repository information.</returns>
     public static IGit Git(this IPipelineHookContext context) => context.ServiceProvider.GetRequiredService<IGit>();
 }

src/ModularPipelines/Extensions/BooleanExtensions.cs

@@ -2,8 +2,19 @@
 
 namespace ModularPipelines.Extensions;
 
+/// <summary>
+/// Provides extension methods for <see cref="bool"/> values.
+/// </summary>
 public static class BooleanExtensions
 {
+    /// <summary>
+    /// Converts a boolean value to a <see cref="SkipDecision"/>.
+    /// If the value is <c>true</c>, returns a skip decision with the specified reason.
+    /// If the value is <c>false</c>, returns <see cref="SkipDecision.DoNotSkip"/>.
+    /// </summary>
+    /// <param name="value">The boolean value to evaluate.</param>
+    /// <param name="reason">The reason for skipping if the value is <c>true</c>.</param>
+    /// <returns>A <see cref="SkipDecision"/> based on the boolean value.</returns>
     public static SkipDecision AsSkipDecisionIfTrue(this bool value, string reason)
     {
         if (value)