fix(CommandInteraction): update typings and docs for #editReply

[iShibi]

Please describe the changes this PR makes and why it should be merged:

Closes: #5629
⚠️This PR is not a direct fix for that issue, see this

CommandInteraction#editReply can take MessageAttachment too. This PR updates the typings and docs for it.

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 includes breaking changes (methods removed or renamed, parameters moved or removed)

[vaporoxx]

Since CommandInteraction#editReply is really just Webhook#editMessage/WebhookClient#editMessage under the hood, shouldn't the types be updated there too? (As well as WebhookEditMessageOptions#files if it works, otherwise support for that should be added)

[iShibi]

Since CommandInteraction#editReply is really just Webhook#editMessage/WebhookClient#editMessage under the hood, shouldn't the types be updated there too? (As well as WebhookEditMessageOptions#files if it works, otherwise support for that should be added)

Yup, the type for options param in Webhook#editMessage should be WebhookEditMessageOptions | MessageAdditions instead of what it currently is. I don't get what you meant by WebhookEditMessageOptions#files tho

[iShibi]

Oh, It took me some time but I got it. Yeah, the WebhookEditMessageOptions#files should also show that it can take Array<MessageAttachment> or Array<BufferResolvable>. I also noticed that the files field in all types of message options only show array of fileoptions or BufferResolvable as a valid type, it's missing the MessageAttachment. I can fix that in #5632 but the question is should I add the other two changes (Webhook#editMessage & WebhookEditMessageOptions#files) here or it's out of the scope of this PR?