feat: add new input processors (readline), add new figlet font

Program.cs

@@ -56,9 +56,21 @@ if (ProviderFactory.IsOpenRouter(endpoint))
 
 
 // ── Pretty header ───────────────────────────────────────────────────────
-AnsiConsole.Write(
-    new FigletText("anchor")
-        .Color(Color.CornflowerBlue));
+var fontStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("AnchorCli.Assets.3d.flf");
+if (fontStream != null)
+{
+    var font = FigletFont.Load(fontStream);
+    AnsiConsole.Write(
+        new FigletText(font, "anchor")
+            .Color(Color.CornflowerBlue));
+}
+else
+{
+    AnsiConsole.Write(
+        new FigletText("anchor")
+            .Color(Color.CornflowerBlue));
+}
+
 
 var version = Assembly.GetExecutingAssembly().GetName().Version?.ToString() ?? "unknown";