Replace First Argument of Paginator.send to be only Context

[Makiyu-py]

Summary

Fixed clear-up on Paginator.send's first parameter. (see #651)

I feel like I made an error on the documentation so please double-check thanks

Checklist

• 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
• 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, ...)

[plun1331]

You could also add an option to pass a channel and a user that can use the paginator

[krittick]

FYI, ext.pages is currently being reworked in #629 and large changes to how send() and respond() work are being included as part of that. I can keep this change in mind when I do that, but otherwise it's going to be work that will be overwritten with the changes in #629.