docs: add cloud plans & pricing page (#13420)

* docs: add cloud plans & pricing page

* fix buttons

* simplify condition

* remove test frontmatter

* design fixes and changes

* styling fixes

* change node version for tests

* fix build error

* fix tests

* fix github pipeline

www/apps/cloud/generated/sidebar.mjs

@@ -171,6 +171,14 @@ export const generatedSidebars = [
             "path": "/billing",
             "children": []
           },
+          {
+            "loaded": true,
+            "isPathHref": true,
+            "type": "link",
+            "title": "Plans & Pricing",
+            "path": "/pricing",
+            "children": []
+          },
           {
             "loaded": true,
             "isPathHref": true,