Made demo files into typescript files

demo/demo12.ts

@@ -0,0 +1,25 @@
+// Scaling images
+// Import from 'docx' rather than '../build' if you install from npm
+import * as fs from "fs";
+import { Document, Packer, Paragraph } from "../build";
+
+const doc = new Document();
+
+const paragraph = new Paragraph("Hello World");
+doc.addParagraph(paragraph);
+
+const image = doc.createImage(fs.readFileSync("./demo/images/pizza.gif"));
+const image2 = doc.createImage(fs.readFileSync("./demo/images/pizza.gif"));
+const image3 = doc.createImage(fs.readFileSync("./demo/images/pizza.gif"));
+const image4 = doc.createImage(fs.readFileSync("./demo/images/pizza.gif"));
+
+image.scale(0.5);
+image2.scale(1);
+image3.scale(2.5);
+image4.scale(4);
+
+const packer = new Packer();
+
+packer.toBuffer(doc).then((buffer) => {
+    fs.writeFileSync("My Document.docx", buffer);
+});