test(tools-pack): give packaging suites a realistic timeout (#6215)

tools/pack had no vitest config, so its suites ran on vitest's 5s default.
That package shells out to real packaging tools — 7z archive and extract,
pnpm pack, installer assembly — against temp directories, so 5s is close
enough to their actual cost that runner speed alone decides pass/fail.

The Windows launcher payload archive test failed merge-queue CI at 5007ms
while passing the same tree on the pull-request run and locally.

Add a package vitest config with testTimeout 20_000, matching apps/daemon,
which is subprocess-heavy for the same reason. The include pattern matches
the 36 existing suites exactly; test counts are unchanged.

Author: PerishCode

tools/pack/vitest.config.ts

@@ -0,0 +1,14 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    environment: "node",
+    include: ["tests/**/*.test.ts"],
+    // These suites shell out to real packaging tools — 7z archive/extract,
+    // pnpm pack, installer assembly — against temp directories. Vitest's 5s
+    // default is close enough to their real cost that runner speed alone
+    // decides pass/fail: the Windows launcher payload archive test failed CI
+    // at 5007ms while passing locally and on faster runners.
+    testTimeout: 20_000,
+  },
+});