[Surveys] - Add External Survey Support

[amrhossamdev]

Implement support for external surveys in the iOS app. This should include the ability to configure and display external surveys (e.g., Google Forms) within the app, as described in the GSoC survey feature issue (#819). The user should be able to open external survey links and, upon interaction, the survey should be marked as completed.

Reference: GSoC Survey Feature Issue #819