add cursor

.cursor/rules/nestjs-testing-guidelines.mdc

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+---
+description: Sets standards for testing NestJS applications, including unit, integration, and end-to-end tests, plus the use of Jest.
+globs: **/*.spec.ts
+---
+- Use the standard Jest framework for testing.
+- Write tests for each controller and service.
+- Write end to end tests for each api module.
+- Add a admin/test method to each controller as a smoke test.