feat(admin): provide show_confetti_after_signing as initial state

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

lib/Settings/Admin.php

@@ -89,6 +89,7 @@ public function getForm(): TemplateResponse {
 		$this->initialState->provideInitialState('approval_group', $this->appConfig->getValueArray(Application::APP_ID, 'approval_group', ['admin']));
 		$this->initialState->provideInitialState('envelope_enabled', $this->appConfig->getValueBool(Application::APP_ID, 'envelope_enabled', true));
 		$this->initialState->provideInitialState('parallel_workers', $this->appConfig->getValueString(Application::APP_ID, 'parallel_workers', '4'));
+		$this->initialState->provideInitialState('show_confetti_after_signing', $this->appConfig->getValueBool(Application::APP_ID, 'show_confetti_after_signing', true));
 		return new TemplateResponse(Application::APP_ID, 'admin_settings');
 	}