feat: add php rule pack

.cursor/rules/php-patterns.md

@@ -0,0 +1,23 @@
+---
+description: "PHP patterns extending common rules"
+globs: ["**/*.php", "**/composer.json"]
+alwaysApply: false
+---
+# PHP Patterns
+
+> This file extends the common patterns rule with PHP specific content.
+
+## Thin Controllers, Explicit Services
+
+- Keep controllers focused on transport: auth, validation, serialization, status codes.
+- Move business rules into application/domain services that are easy to test without HTTP bootstrapping.
+
+## DTOs and Value Objects
+
+- Replace shape-heavy associative arrays with DTOs for requests, commands, and external API payloads.
+- Use value objects for money, identifiers, and constrained concepts.
+
+## Dependency Injection
+
+- Depend on interfaces or narrow service contracts, not framework globals.
+- Pass collaborators through constructors so services are testable without service-locator lookups.