Sync from upstream: README install note, CRLF fix in gen-nvidia-reqs

gen-nvidia-reqs.py wrote requirements-nvidia.txt with os.linesep, so running
it on Windows produced CRLF. Pinned to newline="\n".

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

bin/gen-nvidia-reqs.py

@@ -43,6 +43,9 @@ def main():
     suffix = wheel_suffix(major, minor)
     print(f"PyTorch wheel: {suffix}")
 
+    # newline="\n": write_text() otherwise translates to os.linesep, so running
+    # this on the Windows box produced a CRLF requirements file that then showed
+    # up as a whole-file diff every time it was published.
     NVIDIA_REQS.write_text(f"""\
 # --- Force NVIDIA/CUDA Priority ---
 --index-url https://download.pytorch.org/whl/{suffix}
@@ -54,7 +57,7 @@ def main():
 torch
 torchaudio
 torchvision
-""")
+""", newline="\n")
 
     print(f"\nWritten: {NVIDIA_REQS}")
     print("Run 'ncp backup' to push it to the router.")