Initial commit: ZIL source + Python game engine

Original ZIL source code for The Hitchhiker's Guide to the Galaxy (Infocom, 1984)
plus a native Python text adventure engine with the Earth opening sequence playable
(Bedroom → Front Porch → Front of House → Country Lane → Pub).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,4 @@
+__pycache__/
+*.pyc
+*.pyo
+save.qzl