Change docx folder to more appropriate "file" folder

src/file/drawing/inline/graphic/graphic-data/pic/blip/stretch.ts

@@ -0,0 +1,16 @@
+import { XmlComponent } from "../../../../../../xml-components";
+
+class FillRectangle extends XmlComponent {
+
+    constructor() {
+        super("a:fillRect");
+    }
+}
+
+export class Stretch extends XmlComponent {
+
+    constructor() {
+        super("a:stretch");
+        this.root.push(new FillRectangle());
+    }
+}