feat(lang): add Yield scheduler and structural lemmas - #1

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. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Notations "_ ~ 1" defined at level 7 with arguments constr

Use of “Require” inside a section is fragile. It is not recommended

Use of “Require” inside a section is fragile. It is not recommended

Use of “Require” inside a section is fragile. It is not recommended

Notation Nat.mod_mul is deprecated since 8.17.

Notation Nat.mod_mul is deprecated since 8.17.

Notation Nat.mod_mul is deprecated since 8.17.

Notation Nat.mod_mul is deprecated since 8.17.

Notation Nat.mod_mul is deprecated since 8.17.