Add more table demos

demo/demo28.ts

@@ -0,0 +1,18 @@
+// Example of how you would create a table and add data to it
+// Import from 'docx' rather than '../build' if you install from npm
+import * as fs from "fs";
+import { Document, Packer, Paragraph, VerticalAlign } from "../build";
+
+const doc = new Document();
+
+const table = doc.createTable(4, 4);
+table
+    .getCell(2, 2)
+    .addContent(new Paragraph("This text should be in the middle of the cell"))
+    .CellProperties.setVerticalAlign(VerticalAlign.CENTER);
+
+const packer = new Packer();
+
+packer.toBuffer(doc).then((buffer) => {
+    fs.writeFileSync("My Document.docx", buffer);
+});