RerunHD: third-party software

RerunHD's own code is proprietary. It works with, or fetches when installed, the following, each under its own
licence (their full texts are in their own packages, installed beside RerunHD):

- FFmpeg 8.1.3 (BtbN's build, configured with --enable-gpl and --enable-version3, with x264 and x265): GNU GPL
  version 3 or later. RerunHD runs it as a separate program and never links it. Its licence text is installed beside
  it (ffmpeg/LICENSE.txt). The exact source of this build and of the libraries in it, with its configure line, is
  offered for at least three years: ask at support@rerunhd.com.
- PyTorch and torchvision: BSD-3-Clause.
- NumPy: BSD-3-Clause.
- spandrel: MIT.
- Real-ESRGAN's model files (realesr-general-x4v3, realesr-general-wdn-x4v3, release v0.2.5.0): BSD-3-Clause.
- Python 3.12 (provided by uv): the Python Software Foundation License, with its own components' licences.
- uv (Windows installer only): MIT or Apache-2.0.
- AMD ROCm (on AMD cards) or NVIDIA CUDA (on NVIDIA cards) runtime libraries: downloaded at install from AMD's or
  PyTorch's own repository under their makers' licences; RerunHD doesn't redistribute them.