chore(knip): declare directory-picker-native's e2e entry

The package-wide default only knows spec files; the new built-worker e2e
guard needs the workflow-workerthread-style entry declaration.

knip.json

@@ -76,6 +76,16 @@
         "tests/**/*.ts"
       ]
     },
+    "packages/host/directory-picker-native": {
+      "entry": [
+        "tests/**/*.spec.{ts,tsx}",
+        "tests/**/*.e2e.ts"
+      ],
+      "project": [
+        "src/**/*.{ts,tsx}",
+        "tests/**/*.{ts,tsx}"
+      ]
+    },
     "packages/client/web-ui": {
       "entry": [
         "tests/**/*.spec.{ts,tsx}"