feat: Introduce client management and integration updates

- Added client_id field to StoreTenantRequest and UpdateTenantRequest for tenant management.
- Updated TenantResource to include client_id in the response.
- Created migration to establish clients table and link tenants to clients.
- Migrated existing tenant integrations to client_integrations table.
- Grouped specific tenants under a shared client (OnTicket) in a new migration.
- Updated seeders to reflect new client structure and relationships.
- Adjusted integration configurations to require client instead of tenant.
- Added tests for client integration functionality and ensured existing tests reflect the new client structure.

app/Domains/Tenant/Requests/UpdateTenantRequest.php

@@ -46,6 +46,7 @@ class UpdateTenantRequest extends FormRequest
         $logoRule = ['nullable', new ImageOrBase64Rule];
 
         return [
+            'client_id' => ['sometimes', 'integer', Rule::exists('clients', 'id')],
             'codigo' => [
                 'nullable',
                 'string',