fix(editor): Validate user info before submiting (#7608)

Validate first and last names before saving them to database. This
should prevent security issue with un-sanitized data that ends up in
emails.

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Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/design-system/src/components/N8nFormBox/FormBox.vue

@@ -24,6 +24,7 @@
 				v-if="buttonText"
 				:label="buttonText"
 				:loading="buttonLoading"
+				data-test-id="form-submit-button"
 				size="large"
 				@click="onButtonClick"
 			/>