add: if scope & fix ci problem

Author: sonnyvesali

data/fixtures/scopes/dart/ifStatement.scope

@@ -0,0 +1,2 @@
+if(foo) {}
+---

data/playground/dart.dart

@@ -0,0 +1,7 @@
+void main() {
+  hi() {
+    if (true) {
+      return true;
+    }
+  }
+}

packages/common/src/scopeSupportFacets/dart.ts

@@ -5,7 +5,5 @@ import { ScopeSupportFacetLevel } from "./scopeSupportFacets.types";
 const { supported, unsupported, notApplicable } = ScopeSupportFacetLevel;
 
 export const dartScopeSupport: LanguageScopeSupportFacetMap = {
-  // list: supported,
-  // map: supported,
   ifStatement: supported,
 };

packages/cursorless-org-docs/src/docs/user/languages/dart.mdx

@@ -0,0 +1,5 @@
+import Language from "./Language";
+
+# dart
+
+<Language languageId="dart"></Language>