LibGL: Add Texture Name Allocation

Texture names can now be allocated via
`glGenTextures` and deallocated via `glDeleteTextures`.

Userland/Libraries/LibGL/Tex/NameAllocator.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Stack.h>
+#include <LibGL/GL/gl.h>
+
+namespace GL {
+
+class TextureNameAllocator {
+public:
+    TextureNameAllocator() = default;
+
+    void allocate(GLsizei count, GLuint* textures);
+    void free(GLsizei count, const GLuint* textures);
+
+private:
+    Stack<GLuint, 512> m_free_texture_names;
+    GLuint m_last_texture_id { 1 };
+};
+
+}