Add Support for Google Tag Manager nonce with CSP

Description: As a user of Sleekplan who integrates the widget using Google Tag Manager and Next.js, I want the widget to support the CSP nonce approach mentioned in Google documentation. Problem: Currently, semantic CSP nonce implementation isn't supported on Sleekplan's widget when loaded via Google Tag Manager, which restricts us from adequately securing the environment against malicious script injection. Benefit: Adding CSP nonce support for Google Tag Manager integration would enhance security for applications leveraging Sleekplan, allowing users to meet stringent security requirements while effectively using the platform.