pi-cocore upstream attribution

This fork derives from pi-cocore by Will Atlas and contributors.
Upstream: https://github.com/willnewby/pi-cocore
Initial upstream commit: fc9fa43 (see the upstream git history for authorship).

The upstream package.json declares "license": "MIT".
This declaration is present in the initial upstream commit and on upstream main.
The upstream repository has no separate LICENSE file or explicit copyright notice.
Upstream attribution and the MIT permission terms are retained below.
This notice does not claim that upstream originally used GPLv3.

This fork is distributed under GNU GPL version 3 or, at your option, any later
version. See LICENSE for the GPLv3 text.

MIT permission terms for the upstream code

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.