Eliminate Company\CompaniesController, introduce owner role

Redistribute methods:
- show() -> BootstrapController::currentCompany()
- store(), destroy(), userCompanies() -> Admin\CompaniesController
- transferOwnership() -> CompanySettingsController

Security fix: introduce 'owner' role for company-level admin, distinct
from 'super admin' which is now global platform admin only.
- CompanyService::setupRoles() creates 'owner' role per company
- Company creation assigns scoped 'owner' role instead of global 'super admin'
- Seeders updated to assign 'owner'

Migration renames all existing company-scoped 'super admin' roles to
'owner' and ensures every company owner has the role assigned.

app/Http/Controllers/Company/General/BootstrapController.php

@@ -76,4 +76,11 @@ class BootstrapController extends Controller
             'modules' => Module::where('enabled', true)->pluck('name'),
         ]);
     }
+
+    public function currentCompany(Request $request)
+    {
+        $company = Company::find($request->header('company'));
+
+        return new CompanyResource($company);
+    }
 }