feat: Add Laravel-specific skill for PHP modules (#64)

Adds a new skill to provide Laravel-specific patterns and guidance for PHP module development.

This includes documentation on:
- Event-driven module structure
- Single-purpose Action classes
- Multi-tenancy with BelongsToWorkspace trait
- UI component conventions (Flux Pro, Font Awesome Pro)
- Common `core` CLI commands for testing, formatting, and analysis.

claude/code/skills/laravel/SKILL.md

@@ -0,0 +1,39 @@
+---
+name: laravel
+description: Use when working on Laravel code in core-* PHP packages
+---
+
+# Laravel Patterns for Host UK
+
+## Module Structure
+All modules follow event-driven loading via Boot class.
+
+## Actions Pattern
+Use single-purpose Action classes:
+```php
+class CreateOrder
+{
+    use Action;
+
+    public function handle(User $user, array $data): Order
+    {
+        return Order::create($data);
+    }
+}
+// Usage: CreateOrder::run($user, $validated);
+```
+
+## Multi-Tenancy
+Always use BelongsToWorkspace trait for tenant-scoped models.
+
+## UI Components
+- Use Flux Pro components (not vanilla Alpine)
+- Use Font Awesome Pro (not Heroicons)
+- UK English spellings (colour, organisation)
+
+## Commands
+```bash
+core php test              # Run Pest tests
+core php fmt --fix         # Format with Pint
+core php stan              # PHPStan analysis
+```