chore: update dependencies and workflow actions

- Update GitHub Actions to latest versions (checkout v6, setup-node v6, cache v4.3)
- Update package dependencies
- Format workflow files
- Update .gitignore and project configuration

src/grammar.json

@@ -7923,4 +7923,4 @@
     "_primary_expression"
   ],
   "reserved": {}
-}
+}

src/node-types.json

@@ -3307,4 +3307,4 @@
     "type": "~",
     "named": false
   }
-]
+]