🍱 Add samples from react.dev

.ocamlformat-ignore

@@ -1 +1 @@
-samples/*
+samples/**

samples/learn-react/conditional_rendering.ml

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+let Item isPacked =
+  if isPacked then
+    view [1]
+  else
+    view [0]
+;;
+let PackingList _ =
+  view [Item true, Item true, Item false]
+;;
+view [PackingList ()]

samples/learn-react/queueing_a_series_of_state_updates.ml

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+let Counter _ =
+  let (number, setNumber) = useState 0 in
+  if number = 0 then (
+    setNumber (fun _ -> number + 5);
+    setNumber (fun n -> n + 1);
+    setNumber (fun _ -> 42)
+  );
+  view [number]
+;;
+view [Counter ()]

samples/learn-react/your_ui_as_a_tree.ml

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+let FancyText x =
+  if x = 0 then
+    view [0]
+  else
+    view [1]
+;;
+let InspirationGenerator children =
+  let (index, setIndex) = useState 0 in
+  # need to have indexing
+  children
+;;
+let Copyright year =
+  view [year]
+;;
+let App _ =
+  view [FancyText 42, InspirationGenerator (view [Copyright 2004])]
+;;
+view [App ()]