Add converted syntax files

runtime/syntax/dart.yaml

@@ -1,6 +1,6 @@
 filetype: dart
 
-detect:
+detect: 
     filename: "\\.dart$"
 
 rules:
@@ -11,33 +11,13 @@ rules:
     - statement: "\\b(break|case|catch|continue|default|else|finally)\\b"
     - statement: "\\b(for|function|get|if|in|as|is|new|return|set|switch|final|await|async|sync)\\b"
     - statement: "\\b(switch|this|throw|try|var|void|while|with|import|library|part|const|export)\\b"
-    - constant: "\\b(true|false|null)\\b"
+    - constant.bool: "\\b(true|false|null)\\b"
     - type: "\\b(List|String)\\b"
     - type: "\\b(int|num|double|bool)\\b"
-    - statement: "[-+/*=<>!~%?:&|]"
+    - symbol.operator: "[-+/*=<>!~%?:&|]"
     - constant: "/[^*]([^/]|(\\\\/))*[^\\\\]/[gim]*"
     - constant: "\\\\[0-7][0-7]?[0-7]?|\\\\x[0-9a-fA-F]+|\\\\[bfnrt'\"\\?\\\\]"
-
-    - comment:
-        start: "//"
-        end: "$"
-        rules:
-            - todo: "TODO:?"
-
-    - comment:
-        start: "/\\*"
-        end: "\\*/"
-        rules:
-            - todo: "TODO:?"
-
-    - constant.string:
-        start: "\""
-        end: "\""
-        rules:
-            - constant.specialChar: "\\\\."
-
-    - constant.string:
-        start: "'"
-        end: "'"
-        rules:
-            - constant.specialChar: "\\\\."
+    - comment: "(^|[[:space:]])//.*"
+    - comment: "/\\*.+\\*/"
+    - todo: "TODO:?"
+    - constant.string: "\"(\\\\.|[^\"])*\"|'(\\\\.|[^'])*'"