Add Generator command to generate emoji lookup table

resources/scripts/Generator/Templates/Emoji.Generated.template

@@ -0,0 +1,29 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Generated {{ date.now | date.to_string `%Y-%m-%d %k:%M` }}
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Spectre.Console
+{
+    /// <summary>
+    /// Utility class for working with emojis.
+    /// </summary>
+    internal static partial class Emoji
+    {
+        private static readonly Dictionary<string, string> _emojis
+            = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase)
+        {
+            {{~ for emoji in emojis }}            { "{{ emoji.name }}", "{{ emoji.code }}" },
+            {{~ end ~}}
+        };
+    }
+}