Add @vscode/vsce.

Author: sean-mcmanus

Extension/package.json

@@ -6824,6 +6824,7 @@
         "@vscode/debugprotocol": "^1.65.0",
         "@vscode/dts": "^0.4.0",
         "@vscode/test-electron": "^2.3.10",
+        "@vscode/vsce": "^3.7.1",
         "async-child-process": "^1.1.1",
         "await-notify": "^1.0.1",
         "eslint": "^9.39.2",