Add option to exclude unique names from suggestion lists in JS files

Fixes #26595

**Problem**
TS includes all unique names in a file in the completion list for JavaScript files. This is often desirable, but may result in unexpected completions

**Fix**
Add a new option `javascript.nameSuggestions` to filter these suggestions out.

extensions/typescript/package.json

@@ -307,6 +307,11 @@
           "type": "boolean",
           "default": false,
           "description": "%javascript.implicitProjectConfig.checkJs%"
+        },
+        "javascript.nameSuggestions": {
+          "type": "boolean",
+          "default": true,
+          "description": "%javascript.nameSuggestions%"
         }
       }
     },
@@ -461,4 +466,4 @@
       }
     ]
   }
-}
+}