feat (shells/why3-dev): menhir-lsp

shells/why3-dev/flake.nix

@@ -14,6 +14,7 @@
       devShells."${system}".default =
         let
           pkgs = import nixpkgs { inherit system; };
+          menhir-lsp = pkgs.callPackage ./menhir-lsp.nix (pkgs // pkgs.ocamlPackages);
         in
         pkgs.mkShell {
           packages = with pkgs; [
@@ -32,6 +33,7 @@
             # alt-ergo
             cvc5
             z3
+            menhir-lsp
           ];
         };
     };