Initial release: precompiled Linux x86_64 / CPython 3.12 binary + Python wrapper

OpenMP-parallel numerical kernel library.  No build step required at
install: drop-in shared object plus thin numpy-facing wrapper.

Contents:
  - sem_cython12/sem_core12.cpython-312-x86_64-linux-gnu.so
  - sem_cython12/wrapper.py
  - sem_cython12/__init__.py
  - requirements.txt
  - README.md

.gitignore

@@ -0,0 +1,12 @@
+__pycache__/
+*.pyc
+*.pyo
+.venv/
+venv/
+build/
+dist/
+*.egg-info/
+.pytest_cache/
+.idea/
+.vscode/
+.DS_Store