restore original frontend-tests instructions

Author: ChristopherChudzicki

.github/instructions/frontend-tests.instructions.md

@@ -0,0 +1,10 @@
+---
+applyTo: "**/*.test.ts,**/*.test.tsx"
+---
+
+## Guidelines for writing frontend tests
+
+- `@testing-library/react` and `@testing-library/user-event` for rendering, querying, and manipulation
+- within the `main` package, use `renderWithProviders` from `@/test-utils` to render components with the necessary context providers
+- use `setMockResponse` and `urls` from `api/src/test-utils` for mocking API calls in tests
+- data factories for tests live in `api/src/test-utils/factories`. API Calls should be