feat: textgate AnyType wildcard

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_textgate.py

@@ -0,0 +1,7 @@
+# tests/test_textgate.py
+from gates import textgate
+
+def test_anytype_is_compatible_with_everything():
+    assert (textgate.ANY != "IMAGE") is False
+    assert (textgate.ANY != "LATENT") is False
+    assert isinstance(textgate.ANY, str)