Add swiftlint rule to check for unsafe SFSymbol usage

[bgoncal]

Summary

Screenshots

Link to pull request in Documentation repository

Documentation: home-assistant/companion.home-assistant#

Any other notes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.54%. Comparing base (4f60d68) to head (58813ed).
Report is 71 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3700      +/-   ##
==========================================
+ Coverage   44.72%   45.54%   +0.82%     
==========================================
  Files         232      233       +1     
  Lines       13911    14101     +190     
==========================================
+ Hits         6221     6423     +202     
+ Misses       7690     7678      -12     

☔ 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.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.