fix: Disable continue button unless at least 1 cred has been filled (no-changelog) (#7959)

Disable the continue button in template credential setup unless at least
one credential has been (pre-)filled

packages/editor-ui/src/views/SetupWorkflowFromTemplateView/setupTemplate.store.ts

@@ -227,6 +227,10 @@ export const useSetupTemplateStore = defineStore('setupTemplate', () => {
 		return overrides;
 	});
 
+	const numFilledCredentials = computed(() => {
+		return Object.keys(selectedCredentialIdByKey.value).length;
+	});
+
 	//#endregion Getters
 
 	//#region Actions
@@ -376,6 +380,7 @@ export const useSetupTemplateStore = defineStore('setupTemplate', () => {
 		credentialUsages,
 		selectedCredentialIdByKey,
 		credentialOverrides,
+		numFilledCredentials,
 		createWorkflow,
 		skipSetup,
 		init,