feat: add php rule pack

.cursor/rules/php-testing.md

@@ -0,0 +1,26 @@
+---
+description: "PHP testing extending common rules"
+globs: ["**/*.php", "**/phpunit.xml", "**/phpunit.xml.dist", "**/composer.json"]
+alwaysApply: false
+---
+# PHP Testing
+
+> This file extends the common testing rule with PHP specific content.
+
+## Framework
+
+Use **PHPUnit** as the default test framework. **Pest** is also acceptable when the project already uses it.
+
+## Coverage
+
+```bash
+vendor/bin/phpunit --coverage-text
+# or
+vendor/bin/pest --coverage
+```
+
+## Test Organization
+
+- Separate fast unit tests from framework/database integration tests.
+- Use factory/builders for fixtures instead of large hand-written arrays.
+- Keep HTTP/controller tests focused on transport and validation; move business rules into service-level tests.