Create section properties section

src/file/document/body/section-properties/page-size/page-size-attributes.ts

@@ -0,0 +1,13 @@
+import { XmlAttributeComponent } from "file/xml-components";
+
+export interface IPageSizeAttributes {
+    width: number;
+    height: number;
+}
+
+export class PageSizeAttributes extends XmlAttributeComponent<IPageSizeAttributes> {
+    protected xmlKeys = {
+        width: "w:w",
+        height: "w:h",
+    };
+}