added missing robots.tsx file

out/_not-found/__next._index.txt

@@ -0,0 +1,6 @@
+1:"$Sreact.fragment"
+2:I[7121,[],""]
+3:I[4581,[],""]
+4:I[3585,["500","static/chunks/500-5d45efbf86b8d36e.js","177","static/chunks/app/layout-1fd7b1a1837e99fb.js"],"default"]
+:HL["/_next/static/css/14e80dc03a520726.css","style"]
+0:{"buildId":"2zXAr1NRP_Husrut3sWTG","rsc":["$","$1","c",{"children":[[["$","link","0",{"rel":"stylesheet","href":"/_next/static/css/14e80dc03a520726.css","precedence":"next"}]],["$","html",null,{"lang":"en-GB","suppressHydrationWarning":true,"children":["$","body",null,{"children":[["$","$L2",null,{"parallelRouterKey":"children","template":["$","$L3",null,{}]}],["$","$L4",null,{}]]}]}]]}],"loading":null,"isPartial":false}