Add JSON text renderer (#1086)

* Add JsonText widget to render highlighted JSON

Closes #1051

resources/scripts/Generator/Commands/AsciiCast/Samples/JsonSample.cs

@@ -0,0 +1,39 @@
+using Spectre.Console;
+using Spectre.Console.Json;
+
+namespace Generator.Commands.Samples
+{
+    public class JsonSample : BaseSample
+    {
+        public override (int Cols, int Rows) ConsoleSize => (60, 20);
+
+        public override void Run(IAnsiConsole console)
+        {
+            var json = new JsonText(
+                """
+                { 
+                    "hello": 32, 
+                    "world": { 
+                        "foo": 21, 
+                        "bar": 255,
+                        "baz": [
+                            0.32, 0.33e-32,
+                            0.42e32, 0.55e+32,
+                            {
+                                "hello": "world",
+                                "lol": null
+                            }
+                        ]
+                    } 
+                }
+                """);
+
+            AnsiConsole.Write(
+                new Panel(json)
+                    .Header("Some JSON in a panel")
+                    .Collapse()
+                    .RoundedBorder()
+                    .BorderColor(Color.Yellow));
+        }
+    }
+}