build(python): simplify rpycdec vendor layout

third_party/python/rpycdec/src/renpy/config.py

@@ -0,0 +1,15 @@
+from typing import Optional
+
+# Do we use old text substitutions?
+old_substitutions = True
+
+# An alternate path to use when uneliding. (Mostly used by the launcher to enable
+# the style inspector.)
+alternate_unelide_path = None
+
+# Various directories.
+gamedir = ""
+basedir = ""
+renpy_base = ""
+commondir = None  # type: Optional[str]
+logdir = None  # type: Optional[str] # Where log and error files go.