feat(graindoc): Refactored Graindoc parser (#1658)

Author: ospencer

.github/workflows/ci.yml

@@ -73,6 +73,7 @@ jobs:
       - name: Check parser error messages exhaustiveness
         run: |
           npm run compiler parser:check-errors
+          npm run compiler graindoc-parser:check-errors
 
       # Formatting lint last because building is more important
       - name: Run formatting lint

compiler/esy.json

@@ -38,7 +38,7 @@
     "@opam/dune-configurator": ">= 3.6.1 < 4.0.0",
     "@opam/fp": "0.0.1",
     "@opam/fs": "0.0.2",
-    "@opam/menhir": "20211125",
+    "@opam/menhir": "20220210",
     "@opam/ocamlgraph": ">= 2.0.0 < 3.0.0",
     "@opam/ppx_deriving": ">= 5.2.1 < 6.0.0",
     "@opam/ppx_deriving_cmdliner": ">= 0.6.1",