style: add function.builtin syntax color

Author: meocoder31099

src/theme.ts

@@ -381,7 +381,7 @@ function getTheme({ style, name }: { style: Style, name: string }): Record<strin
                     "font_weight": null
                 },
                 "function.builtin": {
-                    "color": null,
+                    "color": pick({ light: primer.purple[5], dark: primer.purple[6] }),
                     "background_color": null,
                     "font_style": null,
                     "font_weight": null
@@ -513,7 +513,7 @@ function getTheme({ style, name }: { style: Style, name: string }): Record<strin
                     "font_weight": null
                 },
                 "keyword.type": {
-                    "color": null,
+                    "color": "null",
                     "background_color": null,
                     "font_style": null,
                     "font_weight": null
@@ -789,7 +789,7 @@ function getTheme({ style, name }: { style: Style, name: string }): Record<strin
                     "font_weight": null
                 },
                 "variable.builtin": {
-                    "color": null,
+                    "color": "#000",
                     "background_color": null,
                     "font_style": null,
                     "font_weight": null
@@ -813,7 +813,7 @@ function getTheme({ style, name }: { style: Style, name: string }): Record<strin
                     "font_weight": null
                 },
                 "variant": {
-                    "color": null,
+                    "color": primer.blue[6],
                     "background_color": null,
                     "font_style": null,
                     "font_weight": null

themes/github-classic.json

@@ -364,7 +364,7 @@
             "font_weight": null
           },
           "function.builtin": {
-            "color": null,
+            "color": "#6f42c1",
             "background_color": null,
             "font_style": null,
             "font_weight": null
@@ -496,7 +496,7 @@
             "font_weight": null
           },
           "keyword.type": {
-            "color": null,
+            "color": "null",
             "background_color": null,
             "font_style": null,
             "font_weight": null
@@ -772,7 +772,7 @@
             "font_weight": null
           },
           "variable.builtin": {
-            "color": null,
+            "color": "#000",
             "background_color": null,
             "font_style": null,
             "font_weight": null
@@ -796,7 +796,7 @@
             "font_weight": null
           },
           "variant": {
-            "color": null,
+            "color": "#005cc5",
             "background_color": null,
             "font_style": null,
             "font_weight": null
@@ -1165,7 +1165,7 @@
             "font_weight": null
           },
           "function.builtin": {
-            "color": null,
+            "color": "#b392f0",
             "background_color": null,
             "font_style": null,
             "font_weight": null
@@ -1297,7 +1297,7 @@
             "font_weight": null
           },
           "keyword.type": {
-            "color": null,
+            "color": "null",
             "background_color": null,
             "font_style": null,
             "font_weight": null
@@ -1573,7 +1573,7 @@
             "font_weight": null
           },
           "variable.builtin": {
-            "color": null,
+            "color": "#000",
             "background_color": null,
             "font_style": null,
             "font_weight": null
@@ -1597,7 +1597,7 @@
             "font_weight": null
           },
           "variant": {
-            "color": null,
+            "color": "#79b8ff",
             "background_color": null,
             "font_style": null,
             "font_weight": null