Create section properties section

src/file/document/body/body.ts

@@ -1,4 +1,5 @@
 import { XmlComponent } from "file/xml-components";
+import { SectionProperties } from "./section-properties/section-properties";
 
 export class Body extends XmlComponent {
     constructor() {
@@ -7,5 +8,21 @@ export class Body extends XmlComponent {
 
     public push(component: XmlComponent): void {
         this.root.push(component);
+
+        this.root.push(
+            new SectionProperties({
+                width: 11906,
+                height: 16838,
+                top: 1440,
+                right: 1440,
+                bottom: 1440,
+                left: 1440,
+                header: 708,
+                footer: 708,
+                gutter: 0,
+                space: 708,
+                linePitch: 360,
+            }),
+        );
     }
 }