feat: player runtime for goodluke and SaintlyCorruption

Text fields (`input`) with InputValue classes games can extend, continue/break in screen loops, Confirm,
CaptureFocus/ClearFocus/InvertSelected, generator functions and iter/next, starred tuple items,
renpy.file and json over data files loaded before the game starts, renpy.Container and
register_sl_displayable, DiamondBox layout, ConditionSwitch/DynamicImage/Animation, renpy.show(what=...),
callable transforms (`store.move_in(0.3)`), call_in_new_context as a call, im.matrix/im.Image/
MatrixColor, colorsys, fnmatch, FontGroup, persistent._clear and small renpy helpers.

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

frontend/tests/fixtures/dunders.py

@@ -33,3 +33,19 @@ result_loop = [x * 2 for x in bag]
 result_item = bag[1]
 result_in = 4 in bag
 result_out = 9 in bag
+
+
+def walk(values, kind):
+    seen = []
+    for value in values:
+        if isinstance(value, kind):
+            yield value
+        elif isinstance(value, list):
+            yield from walk(value, kind)
+
+
+result_found = list(walk([1, "a", [2, "b", [3]], 4], int))
+result_iter = iter([7, 8])
+result_first = next(result_iter)
+result_second = next(result_iter)
+result_default = next(result_iter, "done")