feat(potal|backend): Add GibOpinion

[cleptric]

This adds a simple polls feature.

[codecov]

Codecov Report

Base: 50.53% // Head: 40.75% // Decreases project coverage by -9.78% ⚠️

Coverage data is based on head (f6c666c) compared to base (b738c0e).
Patch coverage: 1.23% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #43      +/-   ##
============================================
- Coverage     50.53%   40.75%   -9.78%     
- Complexity      162      197      +35     
============================================
  Files            39       45       +6     
  Lines          1310     1634     +324     
============================================
+ Hits            662      666       +4     
- Misses          648      968     +320     

Impacted Files	Coverage Δ
src/Event/AbstractEvent.php	100.00% <ø> (ø)
src/Event/EventFactory.php	76.00% <0.00%> (-14.48%)	⬇️
src/Event/InteractionsCallbackEvent.php	0.00% <0.00%> (ø)
src/Event/SlashCommandEvent.php	0.00% <0.00%> (ø)
src/Http/SlackClient.php	26.08% <0.00%> (-5.50%)	⬇️
src/Model/Table/PollOptionsTable.php	0.00% <0.00%> (ø)
src/Model/Table/PollResponsesTable.php	0.00% <0.00%> (ø)
src/Model/Table/PollsTable.php	0.00% <0.00%> (ø)
src/Service/PollService.php	0.00% <0.00%> (ø)
src/Model/Table/UsersTable.php	34.54% <100.00%> (+5.13%)	⬆️

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