Revert "Revert "Re-implement PixMap writer in Elpi"" · coq-community/corn@5d848c8

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Notation "_ = _" was already used in scope type_scope.

Notation "_ ≠ _" was already used in scope type_scope.

Declaring a scope implicitly is deprecated; use in advance an

Adding and removing hints in the core database implicitly is

Notation "_ = _" was already used in scope type_scope.

Notation "_ ≠ _" was already used in scope type_scope.

Adding and removing hints in the core database implicitly is

Notation Nat.div_le_mono is deprecated since 8.17.

Notation Nat.div_le_mono is deprecated since 8.17.

Notation Nat.div_le_mono is deprecated since 8.17.

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