Fix builtin function name highlighting

grammar.js

@@ -8,6 +8,8 @@ module.exports = grammar({
     /\s/
   ],
 
+  word: $ => $.identifier,
+
   rules: {
     translation_unit: $ => repeat($._top_level_item),
 
@@ -131,7 +133,7 @@ module.exports = grammar({
     ),
 
     function: $ => seq(
-      $.identifier,
+      field("name", $.identifier),
       '(',
       optional(
         repeat(
@@ -191,5 +193,24 @@ module.exports = grammar({
     number: $ => /\d+(\.\d+)?/,
 
     string: $ => /['"].*['"]/,
+
+    //builtin: $ => choice(
+    //  "AUTOREFERENCE",
+    //  "FEEDER",
+    //  "LIGHTS",
+    //  "LOAD",
+    //  "LOG",
+    //  "LOGAPPEND",
+    //  "LOGCREATE",
+    //  "LOGDATA",
+    //  "LOGFIELD",
+    //  "LOGRUN",
+    //  "PANLIGHT",
+    //  "PICTURE",
+    //  "SET",
+    //  "SETCOLOUR",
+    //  "SETLIGHT",
+    //
+    //)
   }
 });

queries/highlights.scm

@@ -65,3 +65,4 @@
 (identifier) @constant.macro
 (number) @number
 (string) @string
+(function name: (identifier) @function)

src/grammar.json

@@ -1,5 +1,6 @@
 {
   "name": "zanscript",
+  "word": "identifier",
   "rules": {
     "translation_unit": {
       "type": "REPEAT",
@@ -366,8 +367,12 @@
       "type": "SEQ",
       "members": [
         {
-          "type": "SYMBOL",
+          "type": "FIELD",
-          "name": "identifier"
+          "name": "name",
+          "content": {
+            "type": "SYMBOL",
+            "name": "identifier"
+          }
         },
         {
           "type": "STRING",

src/node-types.json

@@ -149,10 +149,21 @@
   {
     "type": "function",
     "named": true,
-    "fields": {},
+    "fields": {
+      "name": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "identifier",
+            "named": true
+          }
+        ]
+      }
+    },
     "children": {
       "multiple": true,
-      "required": true,
+      "required": false,
       "types": [
         {
           "type": "identifier",