fix: Improve error handling and user attribute filtering in Rokt Kit

[alexs-mparticle]

Summary

• Adds some protection around filters and filtered users

Testing Plan

• Use a sample app to verify interactions with filtered users

[Copilot]

Pull Request Overview

This PR improves error handling and validates the availability of functions and filters around user attributes in Rokt Kit.

• Removed the catch block from the attachLauncher call to potentially delegate error handling to a higher level.
• Added protection for accessing filterUserAttributes and provided fallback warnings for missing filters.
• Enhanced the assignment of filters by verifying the existence of the Rokt filters before using them.

Comments suppressed due to low confidence (1)

src/Rokt-Kit.js:65

• Removing the catch block may lead to unhandled promise rejections if attachLauncher fails; consider adding error handling or verifying that errors are caught at a higher level.

attachLauncher(accountId, sandboxMode);