* docs: add NOTICE and TRADEMARK files
Adds a NOTICE.md with the GPLv3 §7(b) attribution-preservation terms
that derivative works must carry forward, and a TRADEMARK.md that
covers the Psysonic name, logo, brand identity, and the names of
original Psysonic features (in particular Orbit) — none of which are
licensed under the GPLv3.
Forks remain free under GPLv3 to reuse the code, but must rename
Psysonic-branded assets and feature names, and must preserve the
attribution that original Psysonic features were designed and
implemented in this project.
* docs(readme): add Forks and Attribution section
Points readers at the GPLv3 freedoms while clarifying the expectations
for forks: keep the project name and feature names as documented in
TRADEMARK.md, preserve attribution as required by NOTICE.md, and do
not present original Psysonic work (such as Orbit) as independent
creations of a fork.
Frank Stellmacher