fix(ci): add test script to root package.json and turbo.json pipeline

CI workflows call `pnpm test` but no test script existed at the root.
Adding a `test` turbo task that delegates to workspace packages; since no
packages define a test script yet, turbo exits 0 (no-op) without failing.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ralyodio

package.json

@@ -19,6 +19,7 @@
     "lint": "turbo run lint",
     "typecheck": "turbo run typecheck",
     "clean": "turbo run clean && rm -rf node_modules .turbo",
+    "test": "turbo run test",
     "setup:hooks": "git config core.hooksPath .githooks && echo 'Git hooks configured'"
   },
   "devDependencies": {

turbo.json

@@ -14,6 +14,7 @@
     },
     "lint": { "outputs": [] },
     "typecheck": { "outputs": [] },
+    "test": { "outputs": [] },
     "clean": { "cache": false }
   }
 }