fix: KeyError when using method 'individual'

[doluk]

Summary

Resolve the origin of the variable cmd in ApplicationCommandMixin.register_commands() and fix a bug in the same method when using the sync method individual.

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.

The variable cmd originates from the for-loop in line 602, if the method is not "bulk". Therefore the old code throws a KeyError-Exception, because the key name doesnt't exists. cmd only has the keys action, command and id. This breaks the method individual for syncing commands.

[codecov]

Codecov Report

Merging #1925 (3966f1f) into master (a20a6e8) will not change coverage.
The diff coverage is 0.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1925   +/-   ##
=======================================
  Coverage   33.22%   33.22%           
=======================================
  Files          97       97           
  Lines       19092    19092           
=======================================
  Hits         6343     6343           
  Misses      12749    12749           

Flag	Coverage Δ
macos-latest-3.10	33.20% <0.00%> (ø)
macos-latest-3.11	33.20% <0.00%> (ø)
macos-latest-3.8	33.21% <0.00%> (ø)
macos-latest-3.9	33.21% <0.00%> (ø)
ubuntu-latest-3.10	33.20% <0.00%> (ø)
ubuntu-latest-3.11	33.20% <0.00%> (ø)
ubuntu-latest-3.8	33.21% <0.00%> (ø)
ubuntu-latest-3.9	33.21% <0.00%> (ø)
windows-latest-3.10	33.20% <0.00%> (ø)
windows-latest-3.11	33.20% <0.00%> (ø)
windows-latest-3.8	33.21% <0.00%> (ø)
windows-latest-3.9	33.21% <0.00%> (ø)

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Impacted Files	Coverage Δ
discord/bot.py	18.45% <0.00%> (ø)

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[BobDotCom]

Can you please provide an example of code that would cause the KeyError previously?

[doluk]

Yes, I will post an example in a bit. Here is the non-code version:

• Create a discord client with slash commands
• Then execute client.sync_commands(method='individual')

[Middledot]

I think it would be better if the name of the command was passed into register() instead of keeping the cmd variable "floating" like that. Also, you should add a changelog entry

[Lulalaby]

@doluk please work on that, we want to get it finished <3

[doluk]

@Lulalaby @Middledot
I removed the floating variables now completely and added the changelog entry as requested.
Sorry for the delay. Life being life....

[Lulalaby]

We know, all fine

[Middledot]

Lgtm