Use an SPDX license expression instead of the deprecated license clas…

…sifier

setuptools deprecates license classifiers and stops supporting them after
2027-02-18. The GPLv3 classifier maps to GPL-3.0-only. Requires
setuptools>=77 to build.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019P9bvuGwAyVCNUdsAYPB1V

Update project name to unexport from pyall. (#16)

V0.3.5 & Support tuple all

Fix public comment & docs update (#5)

v0.1.0