feat: add teacher to respective class

[maluviieira]

Closes #1713

Added respective professor(s) to the top of the students list in the classes page.

Review checklist

• Terms and conditions reflect the changes

View Changes

• Description has screenshots of the UI changes.
• Tested both in light and dark mode.
• New text is both in portuguese (PT) and english (EN).
• Works in different text zoom levels.
• Works in different screen sizes.

Performance

• No helper functions to return widgets are added. New widgets are created instead.
• Used ListView.builder for Long Lists.
• Controllers (TextEditingController, ...) are beeing disposed of in dispose() method.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60%. Comparing base (1b80d0b) to head (0c8195a).
⚠️ Report is 2 commits behind head on develop.

❌ Your project check has failed because the head coverage (60%) is below the target coverage (70%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #1763   +/-   ##
=======================================
  Coverage       60%     60%           
=======================================
  Files            2       2           
  Lines           81      81           
=======================================
  Hits            48      48           
  Misses          33      33           

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[pedroafmonteiro]

Thanks for this! It looks great and it appears to be working correctly. However, I noticed that the teachers only appear on course units that the user is currently attending, not on old course units. This is probably because when we are fetching the user's schedule, we are not giving a "period" parameter.