TS: Add setting to prompt users about workspace tsdk (#95566)

* add a setting to prompt users to switch to tsdk version

* version manager in control

Co-authored-by: Duncan Walter <dwalter@hubspot.com>

extensions/typescript-language-features/package.json

@@ -140,6 +140,12 @@
             "usesOnlineServices"
           ]
         },
+        "typescript.enablePromptUseWorkspaceTsdk": {
+          "type": "boolean",
+          "default": false,
+          "description": "%typescript.enablePromptUseWorkspaceTsdk%",
+          "scope": "window"
+        },
         "typescript.npm": {
           "type": [
             "string",