implement pango markup api

src/Interface/Model/Gtk/Pango/Markup.php

@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Yoda\Interface\Model\Gtk\Pango;
+
+/*
+ * Pango markup API
+ *
+ */
+interface Markup
+{
+    public const TAG_CODE = 'tt';
+
+    public static function code(
+        string $value
+    ): string;
+
+    public static function h1(
+        string $value
+    ): string;
+
+    public static function h2(
+        string $value
+    ): string;
+
+    public static function h3(
+        string $value
+    ): string;
+
+    public static function link(
+        string $href,
+        string $title,
+        string $value
+    ): string;
+
+    public static function list(
+        string $value
+    ): string;
+
+    public static function quote(
+        string $value
+    ): string;
+
+    public static function text(
+        string $value
+    ): string;
+
+    public static function pre(
+        string $value
+    ): string;
+
+    public static function tag(
+        string $const,
+        bool $close
+    ): string;
+}