added button form field

src/Field/ButtonField.php

+<?php
+
+namespace DropshippingXmlVendor\WPDesk\Forms\Field;
+
+class ButtonField extends \DropshippingXmlVendor\WPDesk\Forms\Field\NoValueField
+{
+    public function get_template_name()
+    {
+        return 'button';
+    }
+    public function get_type()
+    {
+        return 'button';
+    }
+}

templates/button.php

+<?php
+/**
+ * @var \WPDesk\Forms\Field $field
+ * @var \WPDesk\View\Renderer\Renderer $renderer
+ * @var string $name_prefix
+ * @var string $value
+ *
+ * @var string $template_name Real field template.
+ *
+ */
+?>
+
+<button
+				<?php
+if ($field->has_classes()) {
+    ?>class="<?php
+    echo \esc_attr($field->get_classes());
+    ?>"<?php
+}
+?>
+				<?php
+foreach ($field->get_attributes([]) as $key => $val) {
+    ?>
+					<?php
+    echo $key;
+    ?>="<?php
+    echo \esc_attr($val);
+    ?>"
+				<?php
+}
+?>
+				type="<?php
+echo \esc_attr($field->get_type());
+?>"
+				name="<?php
+echo \esc_attr($name_prefix);
+?>[<?php
+echo \esc_attr($field->get_name());
+?>]"
+				id="<?php
+echo \esc_attr($field->get_id());
+?>"
+				value="<?php
+echo \esc_html($value);
+?>"
+				<?php
+if ($field->is_required()) {
+    ?>required="required"<?php
+}
+?>
+				<?php
+if ($field->is_disabled()) {
+    ?>disabled="disabled"<?php
+}
+?>
+				<?php
+if ($field->is_readonly()) {
+    ?>readonly="readonly"<?php
+}
+?>
+			>
+<?php echo \esc_html($field->get_label()); ?>
+</button>