Add empty test:unit script for tests package

Author: m-houston

tests/package.json

@@ -29,7 +29,8 @@
   "scripts": {
     "clean": "rimraf $(pwd)/target",
     "test:component": "playwright test --config=config/main.config.ts --max-failures=10 --project=component-tests",
-    "test:sandbox": "playwright test --config=config/sandbox.config.ts --max-failures=10 --project=sandbox"
+    "test:sandbox": "playwright test --config=config/sandbox.config.ts --max-failures=10 --project=sandbox",
+    "test:unit": "echo \"No unit tests for tests package\""
   },
   "version": "1.0.0"
 }