Modify rule S1065: Add Dart language

rules/S1065/dart/metadata.json

@@ -0,0 +1,3 @@
+{
+
+}

rules/S1065/dart/rule.adoc

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+== Why is this an issue?
+
+include::../description.adoc[]
+
+=== Noncompliant code example
+
+[source,dart]
+----
+void foo() {
+  outer: //label is not used.
+  for(int i = 0; i < 10; i++) {
+    break;
+  }
+}
+----
+
+=== Compliant solution
+
+[source,dart]
+----
+void foo() {
+  for(int i = 0; i < 10; i++) {
+    break;
+  }
+}
+----
+
+== Resources
+
+* https://wiki.sei.cmu.edu/confluence/x/5dUxBQ[CERT, MSC12-C.] - Detect and remove code that has no effect or is never executed