Add minimal CI setup, adjust readme, add a test#1

namingbe merged 4 commits into

masternsv-format/nsv-python:masterfrom

claude/fix-writer-bug-add-tests-01JVrSqjcUzExom1R8xathdensv-format/nsv-python:claude/fix-writer-bug-add-tests-01JVrSqjcUzExom1R8xathdeCopy head branch name to clipboard