Change docx folder to more appropriate "file" folder

src/file/drawing/index.ts

@@ -0,0 +1,16 @@
+import { IData } from "../media";
+import { XmlComponent } from "../xml-components";
+import { Inline } from "./inline";
+
+export class Drawing extends XmlComponent {
+
+    constructor(imageData: IData) {
+        super("w:drawing");
+
+        if (imageData === undefined) {
+            throw new Error("imageData cannot be undefined");
+        }
+
+        this.root.push(new Inline(imageData.referenceId));
+    }
+}