docs: Integrate docusaraus for docs (#5482)

* feat:Integrate docusaraus for docs

* Update docs for Excalidraw

Co-authored-by: David Luzar <luzar.david@gmail.com>

* remove blogs

* remove blog authors

* get started docs

* typo

* add static assets

* change port number

* Add script to build docs only if docs updated

* dummy

* update script to be compatible with ignoreBuild in vercel

* remove script and dummy log

Co-authored-by: David Luzar <luzar.david@gmail.com>

docs/src/components/Homepage/index.js

@@ -0,0 +1,62 @@
+import React from "react";
+import clsx from "clsx";
+import styles from "./styles.module.css";
+
+const FeatureList = [
+  {
+    title: "Learn how Excalidraw works",
+    Svg: require("@site/static/img/undraw_innovative.svg").default,
+    description: (
+      <>Want to contribute to Excalidraw but got lost in the codebase?</>
+    ),
+  },
+  {
+    title: "Integrate Excalidraw",
+    Svg: require("@site/static/img/undraw_blank_canvas.svg").default,
+    description: (
+      <>
+        Want to build your own app powered by Excalidraw by don't know where to
+        start?
+      </>
+    ),
+  },
+  {
+    title: "Help us improve",
+    Svg: require("@site/static/img/undraw_add_files.svg").default,
+    description: (
+      <>
+        Are the docs missing something? Anything you had trouble understanding
+        or needs an explanation? Come contribute to the docs to make them even
+        better!
+      </>
+    ),
+  },
+];
+
+function Feature({ Svg, title, description }) {
+  return (
+    <div className={clsx("col col--4")}>
+      <div className="text--center">
+        <Svg className={styles.featureSvg} role="img" />
+      </div>
+      <div className="text--center padding-horiz--md">
+        <h3>{title}</h3>
+        <p>{description}</p>
+      </div>
+    </div>
+  );
+}
+
+export default function HomepageFeatures() {
+  return (
+    <section className={styles.features}>
+      <div className="container">
+        <div className="row">
+          {FeatureList.map((props, idx) => (
+            <Feature key={idx} {...props} />
+          ))}
+        </div>
+      </div>
+    </section>
+  );
+}