Refactor cached tenant resolvers with decorator pattern

tests/Repository/InMemoryTenantRepository.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Stancl\Tenancy\Tests\Repository;
+
+use Illuminate\Support\Collection;
+use Stancl\Tenancy\Contracts\Tenant;
+use Stancl\Tenancy\Repository\TenantRepository;
+
+class InMemoryTenantRepository implements TenantRepository
+{
+    public function __construct(
+        /** @var Collection<Tenant> */
+        private Collection $tenants = new Collection(),
+    ) {
+    }
+
+    public function find(int|string $id): ?Tenant
+    {
+        return $this->tenants->first(fn (Tenant $tenant) => $tenant->getTenantKey() == $id);
+    }
+
+    public function findForDomain(string $domain): ?Tenant
+    {
+        return $this->tenants->firstWhere(fn (Tenant $tenant) => in_array($domain, $tenant->domains ?? []));
+    }
+
+    public function all(): iterable
+    {
+        return $this->tenants->lazy();
+    }
+
+    public function whereKeyIn(string|int ...$ids): iterable
+    {
+        return $this->tenants->filter(fn (Tenant $tenant) => in_array($tenant->getTenantKey(), $ids))->lazy();
+    }
+
+    public function store(Tenant $tenant): void
+    {
+        $this->tenants->push($tenant);
+    }
+}