* Support command description localization

eg.
 [CommandOption("-a|--args")]
 [Description(nameof(Str.GitArgs))]
 [Localization(typeof(Str))]
 public string Args { get; set; }

src/Spectre.Console.Cli/Internal/CommandExecutor.cs

@@ -12,7 +12,7 @@ internal sealed class CommandExecutor
         _registrar.Register(typeof(DefaultPairDeconstructor), typeof(DefaultPairDeconstructor));
     }
 
-    public async Task<int> Execute(IConfiguration configuration, IEnumerable<string> args)
+    public async Task<int> ExecuteAsync(IConfiguration configuration, IEnumerable<string> args)
     {
         CommandTreeParserResult parsedResult;
 
@@ -118,7 +118,7 @@ internal sealed class CommandExecutor
                 leaf.Command.Data);
 
             // Execute the command tree.
-            return await Execute(leaf, parsedResult.Tree, context, resolver, configuration).ConfigureAwait(false);
+            return await ExecuteAsync(leaf, parsedResult.Tree, context, resolver, configuration).ConfigureAwait(false);
         }
     }
 
@@ -215,7 +215,7 @@ internal sealed class CommandExecutor
         return (parsedResult, tokenizerResult);
     }
 
-    private static async Task<int> Execute(
+    private static async Task<int> ExecuteAsync(
         CommandTree leaf,
         CommandTree tree,
         CommandContext context,
@@ -249,7 +249,7 @@ internal sealed class CommandExecutor
             }
 
             // Execute the command.
-            var result = await command.Execute(context, settings);
+            var result = await command.ExecuteAsync(context, settings);
             foreach (var interceptor in interceptors)
             {
                 interceptor.InterceptResult(context, settings, ref result);

src/Spectre.Console.Cli/Internal/DelegateCommand.cs

@@ -9,7 +9,7 @@ internal sealed class DelegateCommand : ICommand
         _func = func;
     }
 
-    public Task<int> Execute(CommandContext context, CommandSettings settings)
+    public Task<int> ExecuteAsync(CommandContext context, CommandSettings settings)
     {
         return _func(context, settings);
     }

src/Spectre.Console.Cli/Internal/Extensions/LocalizationExtensions.cs

@@ -0,0 +1,21 @@
+namespace Spectre.Console.Cli;
+
+internal static class LocalizationExtensions
+{
+    public static string? LocalizedDescription(this MemberInfo me)
+    {
+        var description = me.GetCustomAttribute<DescriptionAttribute>();
+        if (description is null)
+        {
+            return null;
+        }
+
+        var localization = me.GetCustomAttribute<LocalizationAttribute>();
+        string? localizedText;
+        return (localizedText = localization?.ResourceClass
+            .GetProperty(description.Description)?
+            .GetValue(default) as string) != null
+            ? localizedText
+            : description.Description;
+    }
+}

src/Spectre.Console.Cli/Internal/Modelling/CommandInfo.cs

@@ -48,10 +48,10 @@ internal sealed class CommandInfo : ICommandContainer, ICommandInfo
 
         if (CommandType != null && string.IsNullOrWhiteSpace(Description))
         {
-            var description = CommandType.GetCustomAttribute<DescriptionAttribute>();
+            var description = CommandType.LocalizedDescription();
             if (description != null)
             {
-                Description = description.Description;
+                Description = description;
             }
         }
     }

src/Spectre.Console.Cli/Internal/Modelling/CommandModelBuilder.cs

@@ -174,7 +174,7 @@ internal static class CommandModelBuilder
 
     private static CommandOption BuildOptionParameter(PropertyInfo property, CommandOptionAttribute attribute)
     {
-        var description = property.GetCustomAttribute<DescriptionAttribute>();
+        var description = property.LocalizedDescription();
         var converter = property.GetCustomAttribute<TypeConverterAttribute>();
         var deconstructor = property.GetCustomAttribute<PairDeconstructorAttribute>();
         var valueProvider = property.GetCustomAttribute<ParameterValueProviderAttribute>();
@@ -189,14 +189,14 @@ internal static class CommandModelBuilder
         }
 
         return new CommandOption(property.PropertyType, kind,
-            property, description?.Description, converter, deconstructor,
+            property, description, converter, deconstructor,
             attribute, valueProvider, validators, defaultValue,
             attribute.ValueIsOptional);
     }
 
     private static CommandArgument BuildArgumentParameter(PropertyInfo property, CommandArgumentAttribute attribute)
     {
-        var description = property.GetCustomAttribute<DescriptionAttribute>();
+        var description = property.LocalizedDescription();
         var converter = property.GetCustomAttribute<TypeConverterAttribute>();
         var defaultValue = property.GetCustomAttribute<DefaultValueAttribute>();
         var valueProvider = property.GetCustomAttribute<ParameterValueProviderAttribute>();
@@ -206,7 +206,7 @@ internal static class CommandModelBuilder
 
         return new CommandArgument(
             property.PropertyType, kind, property,
-            description?.Description, converter,
+            description, converter,
             defaultValue, attribute, valueProvider,
             validators);
     }