feat(grammar): conventions registry, template conditions and a separatrix-distance base - #38

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea, actions/setup-python@v5, astral-sh/setup-uv@v5, codecov/test-results-action@v1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

This action is being deprecated in favor of 'codecov-action'. Please update CI accordingly to use 'codecov-action@v5' with 'report_type: test_results'. The 'codecov-action' should and can be run at least once for coverage and once for test results