feat(llc, samples): add polls in sample app

[renefloor]

Submit a pull request

Closes FLU-247

CLA

• I have signed the Stream CLA (required).
• The code changes follow best practices
• Code changes are tested (add some information if not applicable)

Description of the pull request

This renders polls in the sample app and makes it possible to add polls.

The 'create poll' feature is mostly separated from the sdk. The 'show poll' highly depends on the SDK. If we want to separate it at some point we have to create some new state models, but we would also improve the UI.

Screenshots / Videos

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 3.30%. Comparing base (5cea126) to head (158f432).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##            main     #38      +/-   ##
========================================
+ Coverage   2.12%   3.30%   +1.17%     
========================================
  Files        117     117              
  Lines       3148    3148              
========================================
+ Hits          67     104      +37     
+ Misses      3081    3044      -37     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.