feat(ui): add identity management for tenants and users

* Implement tenant and user creation in IdentityPage
* Add API calls for managing tenants and users
* Introduce tenant-scoped API requests
* Update sidebar to include identity navigation
* Create BooleanStatusBadge component for key status

internal/config/config.go

@@ -53,6 +53,8 @@ type AuthConfig struct {
 type APIKey struct {
 	ID          string `yaml:"id"`
 	Value       string `yaml:"value"`
+	TenantID    string `yaml:"tenant_id"`
+	Superadmin  bool   `yaml:"superadmin"`
 	Description string `yaml:"description"`
 }