fix(syntax): designate graphql blocks in feature files

now you can
- jump and select to brackets and expand bracket
  selections in feature files
- comment blocks using the usual vscode shortcuts

package.json

@@ -130,7 +130,10 @@
           "text.gherkin.feature"
         ],
         "scopeName": "text.gherkin.feature.graphql",
-        "path": "./syntaxes/graphql.feature.json"
+        "path": "./syntaxes/graphql.feature.json",
+        "embeddedLanguages": {
+          "meta.embedded.block.graphql": "graphql"
+        }
       },
       {
         "injectTo": [

syntaxes/graphql.feature.json

@@ -4,6 +4,7 @@
   "injectionSelector": "L:text -comment",
   "patterns": [
     {
+      "contentName": "meta.embedded.block.graphql",
       "begin": "graphql request\\s*$",
       "end": "(?<=\"\"\")",
       "patterns": [
@@ -23,6 +24,7 @@
       ]
     },
     {
+      "contentName": "meta.embedded.block.graphql",
       "begin": "^\\s*(\"\"\")\\s*(#graphql)\\s*$",
       "beginCaptures": {
         "1": { "name": "string.quoted.double.graphql.begin" },