Bring the package up to date with the Anikeen ID API

Fixed (called endpoints that don't exist):
- charge(): POST v1/billing/charge (Stripe options aren't passed through anymore)
- Invoice::getInvoiceTemporaryUrl(): GET instead of a non-existent PUT
- OrderItems::create(): POST v1/orders/{order}/items
- createUser() / isEmailExisting(): admin endpoints with the app token
- sshKeysByUserId(): app endpoint; no longer returns the first user's keys for every user
- createOrderPreview(): country_iso goes into billing_address as the API expects
- public endpoints (products, order preview) work without a token
- SshKeys::find() results can be deleted

Added:
- Billable: sshKeys() (create, update, delete), billingOverview(), PaymentMethod::delete()
- AnikeenId: products(), boxes(), shipping labels (list, show, pdf, issue, ship, price list),
  createOrderForUser(), createTransactionForUser(), findOrCreateSocialiteUser()

Requirements: PHP 8.2+, Laravel 11-13 (Laravel 10 and PHP 8.1 are end of life).
Docs generator handles union types; README regenerated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/Id/Concerns/ManagesSubscriptions.php

@@ -1,38 +1,38 @@
-<?php
-
-namespace Anikeen\Id\Concerns;
-
-use Anikeen\Id\Resources\AppSubscriptions;
-use Anikeen\Id\Resources\Subscriptions;
-use Throwable;
-
-trait ManagesSubscriptions
-{
-    use HasBillable;
-
-    /**
-     * Get subscriptions from the current user.
-     *
-     * @throws Throwable
-     */
-    public function subscriptions(): Subscriptions
-    {
-        if (!isset($this->subscriptionsCache)) {
-            $this->subscriptionsCache = Subscriptions::builder(fn() => $this->anikeenId()
-                ->request('GET', 'v1/subscriptions'))
-                ->setBillable($this);
-        }
-
-        return $this->subscriptionsCache;
-    }
-
-    /**
-     * The user's subscriptions, managed with the app's own token instead of the user's
-     * (trusted apps only, scope subscriptions:client). Use this in jobs and anywhere the user's
-     * login may have expired.
-     */
-    public function appSubscriptions(): AppSubscriptions
-    {
-        return new AppSubscriptions($this);
-    }
-}
+<?php
+
+namespace Anikeen\Id\Concerns;
+
+use Anikeen\Id\Resources\AppSubscriptions;
+use Anikeen\Id\Resources\Subscriptions;
+use Throwable;
+
+trait ManagesSubscriptions
+{
+    use HasBillable;
+
+    /**
+     * Get subscriptions from the current user.
+     *
+     * @throws Throwable
+     */
+    public function subscriptions(): Subscriptions
+    {
+        if (!isset($this->subscriptionsCache)) {
+            $this->subscriptionsCache = Subscriptions::builder(fn() => $this->anikeenId()
+                ->request('GET', 'v1/subscriptions'))
+                ->setBillable($this);
+        }
+
+        return $this->subscriptionsCache;
+    }
+
+    /**
+     * The user's subscriptions, managed with the app's own token instead of the user's
+     * (trusted apps only, scope subscriptions:client). Use this in jobs and anywhere the user's
+     * login may have expired.
+     */
+    public function appSubscriptions(): AppSubscriptions
+    {
+        return new AppSubscriptions($this);
+    }
+}␍