New Textbox Component (#2718)

* Adding textbox with no props

* Fixing namings and adding shape style

* simplify usage

* Fix linting issues

* Re-name demo

* Use new shape authoring style

* Add tests

Simplify API

* Add better types for styles

* Add more options to TextBox and add documentation

---------

Co-authored-by: zohar11 <zohar@sumit-ai.com>
Co-authored-by: Dolan <dolan_miu@hotmail.com>

demo/94-texbox.ts

@@ -0,0 +1,43 @@
+// Simple example to add textbox to a document
+import { Document, Packer, Paragraph, Textbox, TextRun } from "docx";
+import * as fs from "fs";
+
+const doc = new Document({
+    sections: [
+        {
+            properties: {},
+            children: [
+                new Textbox({
+                    alignment: "center",
+                    children: [
+                        new Paragraph({
+                            children: [new TextRun("Hi i'm a textbox!")],
+                        }),
+                    ],
+                    style: {
+                        width: "200pt",
+                        height: "auto",
+                    },
+                }),
+                new Textbox({
+                    alignment: "center",
+                    children: [
+                        new Paragraph({
+                            children: [new TextRun("Hi i'm a textbox with a hidden box!")],
+                        }),
+                    ],
+                    style: {
+                        width: "300pt",
+                        height: 400,
+                        visibility: "hidden",
+                        zIndex: "auto",
+                    },
+                }),
+            ],
+        },
+    ],
+});
+
+Packer.toBuffer(doc).then((buffer) => {
+    fs.writeFileSync("My Document.docx", buffer);
+});