feat: random generators, frozenset and __hash__/__iter__/__getitem__/__contains__ in Ren'Py python

renpy.random/random get choices, sample, randrange and Random(seed); frozenset, iter and hash
are builtins. User classes may define __hash__ (dict keys), __iter__, __getitem__ and
__contains__; the converter accepts them instead of rejecting the whole class, which
removes the Perk/Skill/Status wall in SaintlyCorruption.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

frontend/tests/engine-behavior.test.mjs

@@ -73,3 +73,19 @@ test("an animated preview discarded before its first timer does not keep renderi
     assert.equal(rendered, 1);
   } finally { engine.destroy(); }
 });
+
+test("random generators: choices, sample, seeded Random and frozenset", () => {
+  const { engine } = makeEngine(runtime());
+  try {
+    engine.newStore();
+    const { renpy, frozenset } = engine.builtins;
+    assert.deepEqual(frozenset([1, 2, 2, 3]), [1, 2, 3]);
+    const picked = renpy.random.choices(["a", "b"], { __kw: { weights: [0, 1], k: 5 } });
+    assert.deepEqual(picked, ["b", "b", "b", "b", "b"]);
+    const sample = renpy.random.sample([1, 2, 3, 4], 3);
+    assert.equal(new Set(sample).size, 3);
+    const first = renpy.random.Random("seed"), second = renpy.random.Random("seed");
+    assert.deepEqual([first.randint(1, 1000), first.randint(1, 1000)], [second.randint(1, 1000), second.randint(1, 1000)]);
+    assert.ok(renpy.random.randrange(0, 10, 5) % 5 === 0);
+  } finally { engine.destroy(); }
+});