Revert "website/docs: Prepare for monorepo. (#14119)" (#14239)

This reverts commit 5bdef1c4f6.

website/remark/preview-directive.ts

@@ -0,0 +1,43 @@
+import "mdast-util-to-hast";
+import "mdast-util-directive";
+
+import { h } from "hastscript";
+import { Root } from "mdast";
+import { visit, SKIP } from "unist-util-visit";
+
+/**
+ * MDAST plugin to transform `ak-preview` directives into preview badges.
+ */
+function remarkPreviewDirective() {
+    return function (tree: Root) {
+        visit(tree, "textDirective", function (node) {
+            if (node.name !== "ak-preview") return SKIP;
+
+            const data = node.data || (node.data = {});
+
+            const hast = h("span", {
+                ...node.attributes,
+                className: "badge badge--preview",
+                title: `This feature is in preview and may change in the future.`,
+                "aria-description": "Preview badge",
+                role: "img",
+            });
+
+            data.hName = hast.tagName;
+            data.hProperties = hast.properties;
+
+            data.hChildren = [
+                {
+                    type: "text",
+                    value: "Preview",
+                },
+            ];
+
+            node.children = [];
+
+            return SKIP;
+        });
+    };
+}
+
+export default remarkPreviewDirective;