docs: fix markdown content returning 404 (#16052)

Author: shahednasser

www/apps/book/next.config.mjs

@@ -128,16 +128,19 @@ const nextConfig = {
           destination: "/md-content",
         },
         {
-          source: "/:path*/index.html.md",
-          destination: "/md-content/:path*",
+          source:
+            "/:first((?!resources|api|ui|user-guide|cloud|md-content)[^/]+)/:rest*/index.html.md",
+          destination: "/md-content/:first/:rest*",
         },
         {
-          source: "/:path*/index.md",
-          destination: "/md-content/:path*",
+          source:
+            "/:first((?!resources|api|ui|user-guide|cloud|md-content)[^/]+)/:rest*/index.md",
+          destination: "/md-content/:first/:rest*",
         },
         {
-          source: "/:path*.md",
-          destination: "/md-content/:path*",
+          source:
+            "/:first((?!resources|api|ui|user-guide|cloud|md-content)[^/]+)/:rest*.md",
+          destination: "/md-content/:first/:rest*",
         },
         {
           source: