Black dependency created a dependabot warning and couldn't be bumped since it collided with pathspec dependencies. Since ruff can also format, black is not needed. But we now have these small format changes, mostly in test files
- Add Elixir/Erlang setup to pytest.yml using erlef/setup-beam@v1
- Configure Elixir 1.18.4 and OTP 26.1 for CI compatibility
- Fix codespell false positive for '*cripts' glob pattern with ignore comment
- Resolves CI test failures for Elixir language server integration