Change docx folder to more appropriate "file" folder

src/file/paragraph/formatting/page-break.ts

@@ -0,0 +1,21 @@
+// http://officeopenxml.com/WPtextSpecialContent-break.php
+import { Attributes, XmlComponent } from "../../xml-components";
+import { Run } from "../run";
+
+class Break extends XmlComponent {
+
+    constructor() {
+        super("w:br");
+        this.root.push(new Attributes({
+            type: "page",
+        }));
+    }
+}
+
+export class PageBreak extends Run {
+
+    constructor() {
+        super();
+        this.root.push(new Break());
+    }
+}