Add READMEs for remaining packages

- db-schema: Database schema types from kysely-codegen
- db: Database client and helper functions
- testing: Overview of testing packages
- test-helpers: Database testing utilities
- virtual-authenticator: WebAuthn virtual authenticator

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/testing/README.md

@@ -0,0 +1,34 @@
+# Testing Packages
+
+Shared testing utilities for the RevIQ platform.
+
+## Packages
+
+### @reviq/test-helpers
+
+Database testing utilities including test database setup, transactions, and fixtures.
+
+```typescript
+import { createTestDb, withTestTransaction, describeE2E } from "@reviq/test-helpers";
+```
+
+### @reviq/virtual-authenticator
+
+WebAuthn virtual authenticator for testing passkey flows without real hardware.
+
+```typescript
+import { VirtualAuthenticator } from "@reviq/virtual-authenticator";
+```
+
+## Usage
+
+These packages are used internally for e2e and integration tests. Add them as dev dependencies:
+
+```json
+{
+  "devDependencies": {
+    "@reviq/test-helpers": "workspace:*",
+    "@reviq/virtual-authenticator": "workspace:*"
+  }
+}
+```