feat(ContextMenus): add context menu command builder

[Khasms]

Please describe the changes this PR makes and why it should be merged:
Adds context menu command builders according to the docs here and here.

close #28

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)

[codecov-commenter]

Codecov Report

Merging #29 (5f19cce) into main (c0f7993) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #29   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        21    +3     
  Lines          233       264   +31     
  Branches        33        33           
=========================================
+ Hits           233       264   +31     

Impacted Files	Coverage Δ
.../interactions/slashCommands/SlashCommandBuilder.ts	100.00% <ø> (ø)
src/interactions/contextMenuCommands/Assertions.ts	100.00% <100.00%> (ø)
...s/contextMenuCommands/ContextMenuCommandBuilder.ts	100.00% <100.00%> (ø)
...s/slashCommands/mixins/CommandChannelOptionBase.ts	100.00% <0.00%> (ø)

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[monbrey]

Not sure I'd agree that this should be completely separate to the current Slash Command builder - with refactoring a lot of code duplication could be reduced.

[whirlxd]

Is there any eta as of yet on when this is getting merged?

[vladfrangu]

At least 1 day till I fly back home, wrap up another -types release, publish it, and get it here (since it depends on it to be able to proceed)

[skyeredwood]

Any update on the ETA for this?

[vladfrangu]

@Khasms you can pull the main branch and then this PR should be ready 👍

[milanmdev]

any ETA for when this will be merged?

Stale

[ChrisSch-dev]

Any ETA of it being merged?