Add implementation scope to Language4.json

Author: MichaelRFairhurst

rule_packages/c/Language4.json

@@ -44,7 +44,10 @@
           ]
         }
       ],
-      "title": "Obsolencent language features shall not be used"
+      "title": "Obsolencent language features shall not be used",
+      "implementation_scope": {
+        "description": "Usage of obsolescent language features that are already disallowed by Rule 8.2, Rule 8.8, and 21.6 are not redundantly checked by this rule."
+      }
     }
   }
 }

schemas/rule-package.schema.json

@@ -207,6 +207,18 @@
                                 },
                                 "title": {
                                     "type": "string"
+                                },
+                                "implementation_scope": {
+                                    "type": "object",
+                                    "properties": {
+                                        "description": {
+                                            "type": "string"
+                                        }
+                                    },
+                                    "required": [
+                                        "description"
+                                    ],
+                                    "additionalProperties": false
                                 }
                             },
                             "required": [