Resolve "Add CheatSheet form on internal page"

Closes #63 (closed)

src/pages/antiseche.js

+import React from 'react';
+import Layout from "@theme/Layout"; 
+import Link from "@docusaurus/Link";
+
+function GitAntiseche() {
+  return (
+    <Layout title='=Mon antisèche Git' description='Page antisèche Git'>
+    <div
+          style={{
+            display: 'flex',
+            justifyContent: 'center',
+            alignItems: 'center',
+            height: '50vh',
+            fontSize: '20px',
+          }}>
+        <p>
+        Ici, formulaire qu'on récupère pour avoir l'antisèche
+        </p>
+        <script id="form-script-tag-2235710" src="https://google.com/"></script>
+    </div>
+    </Layout>
+  );
+};
+
+export default GitAntiseche;
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