huge documentaton restructure for docusaurus

docs/site/sidebars.js

@@ -0,0 +1,10 @@
+/**
+ * Sidebar configuration for the Fotospiel docs site.
+ */
+
+/** @type {import('@docusaurus/plugin-content-docs').SidebarsConfig} */
+const sidebars = {
+  docsSidebar: [{ type: 'autogenerated', dirName: '.' }],
+};
+
+module.exports = sidebars;