Add a start_dm option to SimpleMenu

[yeetbruises]

Description of the changes

• Added start_dm(user) method to SimpleMenu in "Views.py".
• • This method allows for a direct message to be sent by the bot, which bypasses the usage of "ctx" as a parameter. This also unblocks issue [Help] Send menus to dm if maxpages is 0 #5375. My testing found the buttons do work in DMs following implementation of the new method.
• Fixes Add a start_dm option to SimpleMenu #6282

Have the changes in this PR been tested?

Yes

I tested the method by making changes to "help.py" under the send_pages() method.

The image below shows the modified code in that file.

DM result

[Flame442]

Thanks!

As an FYI, the example screenshot of your testing had a line get_user = ctx.bot.get_user(ctx.author.id). ctx.author is already a User object (even if used in a guild, since the Member object you will get is a subclass of User), so you don't need the extra cache lookup in that case.