Added use of global imports to all projects (#345)

- The MSBuild `ImplicitUsings` is banned but the C# language of `global using` is not. This updates projects to use the C# feature without the MSBuild problems.
* Additional doc updates.

Author: smaillet

src/Interop/LlvmBindingsGenerator/CmdLineArgs.cs

@@ -1,23 +1,18 @@
 // Copyright (c) Ubiquity.NET Contributors. All rights reserved.
 // Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
 
-using System.CommandLine.Parsing;
-using System.IO;
-
-using CppSharp;
-
 namespace LlvmBindingsGenerator
 {
     internal partial class CmdLineArgs
     {
         // [Option("-l", Required=true, Description="Root of source with the LLVM headers to parse (Assumes and validates a sub-folder 'include')"]
         // [AcceptExistingFolderOnly]
-        // [Validator( "CmdLineArgs.ValidateIncludeFolder" )]
+        // [Validator( nameof(ValidateIncludeFolder) )]
         public required DirectoryInfo LlvmRoot { get; init; }
 
         // [Option("-e", Required=true, Description="Root of source with the LibLLVM extension headers to parse (Assumes and validates a sub-folder 'include')"]
         // [AcceptExistingFolderOnly]
-        // [Validator( "CmdLineArgs.ValidateIncludeFolder" )]
+        // [Validator( nameof(ValidateIncludeFolder) )]
         public required DirectoryInfo ExtensionsRoot { get; init; }
 
         // [Option("-e", Required=true, Description="Output to place the generated code for handles. No handle source is generated if this is not provided")]

src/Interop/LlvmBindingsGenerator/CmdLineArgs.g.cs

@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Ubiquity.NET Contributors. All rights reserved.
+// Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
+
+using System;
 using System.Collections.Generic;
 using System.CommandLine;
 using System.CommandLine.Parsing;
@@ -45,7 +48,7 @@ public static AppControlledDefaultsRootCommand BuildRootCommand( CmdLineSettings
         {
             // description is hard coded and should come from generation attribute on the "CmdLineArgs" type
             // TODO: Check for duplicate options.
-            //       (-?,-h, --help, and --version) are used by default options so nothing should use those values.
+            //       (-?, -h, --help, and --version) are used by default options so nothing should use those values.
             //       Generator/analyzer should validate that so it isn't a runtime hit.
             return new AppControlledDefaultsRootCommand( settings, "LLVM handle wrapper source generator" )
             {

src/Interop/LlvmBindingsGenerator/Configuration/GeneratorConfig.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Ubiquity.NET Contributors. All rights reserved.
 // Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
 
-using System.Collections.Immutable;
-
 namespace LlvmBindingsGenerator.Configuration
 {
     internal class GeneratorConfig

src/Interop/LlvmBindingsGenerator/Configuration/HandleDetails.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Ubiquity.NET Contributors. All rights reserved.
 // Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
 
-using System.Diagnostics.CodeAnalysis;
-
 namespace LlvmBindingsGenerator.Configuration
 {
     /// <summary>Details for a handle</summary>

src/Interop/LlvmBindingsGenerator/Configuration/IGeneratorConfig.cs

@@ -1,13 +1,6 @@
 // Copyright (c) Ubiquity.NET Contributors. All rights reserved.
 // Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
 
-using System.Collections.Generic;
-using System.Collections.Immutable;
-using System.Linq;
-
-using LlvmBindingsGenerator.CppSharpExtensions;
-using LlvmBindingsGenerator.Templates;
-
 namespace LlvmBindingsGenerator.Configuration
 {
     /// <summary>Interface for a generator configuration</summary>

src/Interop/LlvmBindingsGenerator/CppSharpExtensions/ASTContextExtensions.cs

@@ -1,13 +1,6 @@
 // Copyright (c) Ubiquity.NET Contributors. All rights reserved.
 // Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
 
-using System;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
-
-using CppSharp.AST;
-
 namespace LlvmBindingsGenerator
 {
     internal static class ASTContextExtensions

src/Interop/LlvmBindingsGenerator/CppSharpExtensions/Driver.cs

@@ -1,20 +1,8 @@
 // Copyright (c) Ubiquity.NET Contributors. All rights reserved.
 // Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
 
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-
-using CppSharp;
-using CppSharp.AST;
-using CppSharp.Generators;
-using CppSharp.Parser;
-using CppSharp.Passes;
-using CppSharp.Types;
-using CppSharp.Utils;
-
 using ClangParser = CppSharp.ClangParser;
+using Module = CppSharp.AST.Module;
 
 namespace LlvmBindingsGenerator
 {

src/Interop/LlvmBindingsGenerator/CppSharpExtensions/ErrorTrackingDiagnostics.cs

@@ -1,10 +1,6 @@
 // Copyright (c) Ubiquity.NET Contributors. All rights reserved.
 // Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
 
-using System;
-
-using CppSharp;
-
 namespace LlvmBindingsGenerator
 {
     internal class ErrorTrackingDiagnostics

src/Interop/LlvmBindingsGenerator/CppSharpExtensions/FieldExtensions.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Ubiquity.NET Contributors. All rights reserved.
 // Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
 
-using CppSharp.AST;
-
 namespace LlvmBindingsGenerator
 {
     internal static class FieldExtensions

src/Interop/LlvmBindingsGenerator/CppSharpExtensions/ICodeGenerator.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Ubiquity.NET Contributors. All rights reserved.
 // Licensed under the Apache-2.0 WITH LLVM-exception license. See the LICENSE.md file in the project root for full license information.
 
-using LlvmBindingsGenerator.CppSharpExtensions;
-
 namespace LlvmBindingsGenerator
 {
     internal interface ICodeGenerator