Add PyInstaller Windows release build system.

Frozen builds resolve paths correctly, stage portable onedir output, and zip releases for distribution.

build/pyi_rth_godcwak.py

@@ -0,0 +1,12 @@
+"""
+PyInstaller runtime hook — normalize frozen paths before application imports.
+"""
+import os
+import sys
+
+if getattr(sys, "frozen", False):
+    os.environ.setdefault("GODCWAK_FROZEN", "1")
+    # Ensure the exe directory is on PATH for any subprocess helpers.
+    exe_dir = os.path.dirname(sys.executable)
+    if exe_dir and exe_dir not in os.environ.get("PATH", ""):
+        os.environ["PATH"] = exe_dir + os.pathsep + os.environ.get("PATH", "")