feat: options refactor

data/gforms-config.json

includes/fields/wpcf7/iban/index.php

includes/integrations/gf/index.php

includes/integrations/index.php

includes/options/BaseSettings.php

includes/options/Menu.php

includes/options/Settings.php

includes/options/fieldsetControl.js

includes/options/index.php

languages/wpct-erp-forms-ca.mo

languages/wpct-erp-forms-ca.po

languages/wpct-erp-forms-en_US.mo

languages/wpct-erp-forms-en_US.po

languages/wpct-erp-forms-es_ES.mo

languages/wpct-erp-forms-es_ES.po

languages/wpct-erp-forms.pot

wpct-erp-forms.php