Add IssueInterface.php

Signed-off-by: Nathanael Esayeas <nathanael.esayeas@protonmail.com>

src/Interface/GitHub/IssueInterface.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Ghostwriter\Arm\Interface\GitHub;
+
+interface IssueInterface
+{
+    public function create(string $issue): string;
+
+    public function delete(string $issue): string;
+
+    public function exists(string $issue): bool;
+
+    public function get(string $issue): string;
+
+    public function list(): array;
+
+    public function set(string $issue): string;
+}