Change docx folder to more appropriate "file" folder

src/file/paragraph/formatting/border.ts

@@ -0,0 +1,23 @@
+// http://officeopenxml.com/WPborders.php
+import { Attributes, XmlComponent } from "../../xml-components";
+
+class Border extends XmlComponent {
+
+    constructor() {
+        super("w:bottom");
+        this.root.push(new Attributes({
+            color: "auto",
+            space: "1",
+            val: "single",
+            sz: "6",
+        }));
+    }
+}
+
+export class ThematicBreak extends XmlComponent {
+
+    constructor() {
+        super("w:pBdr");
+        this.root.push(new Border());
+    }
+}