nps: bundle pkg2zip binary and run it via Wine

pkg2zip's prebuilt releases are Windows-only, so ship pkg2zip.exe in
data/bin/ (MIT, mmozeiko) and invoke it through Wine on Linux. find_pkg2zip
prefers the bundled binary, then a configured path, then a native pkg2zip on
PATH. Adds data/bin/ATTRIBUTION.md and README credit.

app/nopaystation.py

@@ -9,6 +9,7 @@ folder.
 from __future__ import annotations
 
 import logging
+import os
 import shutil
 import subprocess
 import urllib.parse
@@ -142,14 +143,30 @@ def fetch_items(content_type: str, url: str = "", timeout: int = 60) -> List[dic
 
 
 def find_pkg2zip(configured_path: str = "") -> Optional[Path]:
-    """Locate the pkg2zip binary (configured path, else PATH)."""
+    """Locate pkg2zip: configured path, then the bundled binary, then PATH."""
     if configured_path:
         p = Path(configured_path)
         return p if p.is_file() else None
+    bundled = config.DATA_DIR / "bin" / "pkg2zip.exe"
+    if bundled.is_file():
+        return bundled
     found = shutil.which("pkg2zip")
     return Path(found) if found else None
 
 
+def _pkg2zip_cmd(pkg2zip: Path) -> List[str]:
+    """Command prefix for pkg2zip, wrapping the bundled .exe in Wine on Linux."""
+    if pkg2zip.suffix.lower() == ".exe" and os.name != "nt":
+        wine = shutil.which("wine") or shutil.which("wine64")
+        if not wine:
+            raise RuntimeError(
+                "The bundled pkg2zip is a Windows binary and Wine is not installed — "
+                "install Wine (or point Settings → Store at a native pkg2zip)."
+            )
+        return [wine, str(pkg2zip)]
+    return [str(pkg2zip)]
+
+
 def _safe_folder(value: str) -> str:
     import re
     cleaned = re.sub(r"[^A-Za-z0-9]", "", value or "").upper()
@@ -180,10 +197,13 @@ def extract_pkg(pkg_path, title_id: str, dest_dir, pkg2zip: Path,
     if progress_cb is not None:
         progress_cb("Extracting", 0.0, "")
     try:
+        cmd = _pkg2zip_cmd(pkg2zip) + ["-x", str(pkg_path)]
+        env = dict(os.environ)
+        env["WINEDEBUG"] = "-all"  # silence Wine's console chatter
         proc = subprocess.Popen(
-            [str(pkg2zip), "-x", str(pkg_path)],
+            cmd,
             cwd=str(tmp), stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
-            text=True, bufsize=1,
+            text=True, bufsize=1, env=env,
         )
         assert proc.stdout is not None
         for _line in proc.stdout: