feat: Add properties for burst reactions

[NeloBlivion]

Summary

Currently in beta., not yet documented and as such subject to change but the changes already exist on the API.
Adds properties and documentation for burst reactions (known as Super Reactions on the UI).

Information

• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed).
• This PR is not a code change (e.g. documentation, README, typehinting,
  examples, ...).

Checklist

• I have searched the open pull requests for duplicates.
• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• If type: ignore comments were used, a comment is also left explaining why.
• I have updated the changelog to include these changes.

[codecov]

Codecov Report

Merging #1947 (ad9239b) into master (ea3e3db) will decrease coverage by 0.01%.
The diff coverage is 33.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1947      +/-   ##
==========================================
- Coverage   33.24%   33.24%   -0.01%     
==========================================
  Files          97       97              
  Lines       19033    19038       +5     
==========================================
+ Hits         6328     6329       +1     
- Misses      12705    12709       +4     

Flag	Coverage Δ
macos-latest-3.10	33.22% <33.33%> (-0.01%)	⬇️
macos-latest-3.11	33.22% <33.33%> (-0.01%)	⬇️
macos-latest-3.8	33.24% <33.33%> (-0.01%)	⬇️
macos-latest-3.9	33.24% <33.33%> (-0.01%)	⬇️
ubuntu-latest-3.10	33.22% <33.33%> (-0.01%)	⬇️
ubuntu-latest-3.11	33.22% <33.33%> (-0.01%)	⬇️
ubuntu-latest-3.8	33.24% <33.33%> (-0.01%)	⬇️
ubuntu-latest-3.9	33.24% <33.33%> (-0.01%)	⬇️
windows-latest-3.10	33.22% <33.33%> (-0.01%)	⬇️
windows-latest-3.11	33.22% <33.33%> (-0.01%)	⬇️
windows-latest-3.8	33.24% <33.33%> (-0.01%)	⬇️
windows-latest-3.9	33.24% <33.33%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
discord/reaction.py	39.53% <0.00%> (-0.95%)	⬇️
discord/raw_models.py	27.45% <25.00%> (-0.41%)	⬇️
discord/types/message.py	98.87% <100.00%> (+0.01%)	⬆️

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[NeloBlivion]

Now waiting on discord/discord-api-docs#6056, not updating quite yet since it's stated there will be further changes.

[NeloBlivion]

Should largely be complete. Some notes:

• For consistency with the rest of the library, both burst_colours and burst_colors are implemented.
• Added ReactionType enum (0 = normal, 1 = burst). This is present in all relevant payloads as type, however it's undocumented. It is still necessary for Reaction.users().
• raw_reaction_clear_emoji event payloads come with burst and type, however this is unreliable if the removed emoji has both normal and super reactions; in this instance, they default back to False/0.

I have now run out of super reactions for the week so pls test if events work fine too ok thanks

[Lulalaby]

"consistency"
we should get rid of the weird colour honestly

[NeloBlivion]

maybe for v3 but i don't see a reason to drop it from v2