Add chokidar and readdirp to Jest transformIgnorePatterns

Chokidar v5.0.0 is ESM-only ("type": "module") and depends on
readdirp v5 which is also ESM-only. Add both packages to the
transform list so Jest can transpile them during tests.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: cklin

extensions/ql-vscode/test/jest-config.ts

@@ -11,6 +11,7 @@ const transformScopes = [
 ];
 const transformPackages = [
   "before-after-hook",
+  "chokidar",
   "d3",
   "data-uri-to-buffer",
   "delaunator",
@@ -22,6 +23,7 @@ const transformPackages = [
   "nanoid",
   "p-queue",
   "p-timeout",
+  "readdirp",
   "robust-predicates",
   "universal-user-agent",
   "until-async",