feat: PollBuilder

[TAEMBO]

Please describe the changes this PR makes and why it should be merged:
Adds the PollBuilder class that creates API-compatible JSON data for sending polls.

Status and versioning classification:

• Code changes have been tested against the Discord API, or there are no code changes
• I know how to update typings and have done so, or typings don't need updating
• This PR changes the library's interface (methods or parameters added)

[vercel]

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2 Ignored Deployments

Name	Status	Preview	Comments	Updated (UTC)
discord-js	⬜️ Ignored (Inspect)	Visit Preview		Jun 27, 2024 9:36pm
discord-js-guide	⬜️ Ignored (Inspect)	Visit Preview		Jun 27, 2024 9:36pm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.96%. Comparing base (9c76bbe) to head (c97b087).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10324      +/-   ##
==========================================
+ Coverage   50.37%   50.96%   +0.59%     
==========================================
  Files         228      230       +2     
  Lines       20641    20891     +250     
  Branches     1240     1263      +23     
==========================================
+ Hits        10397    10647     +250     
  Misses      10199    10199              
  Partials       45       45              

Flag	Coverage Δ
builders	96.16% <100.00%> (+0.25%)	⬆️

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Stale.

[TAEMBO]

discord/discord-api-docs#6956