Handle discord.Forbidden 90001 errors by default in create_task()

[TizzySaurus]

Adds a utility for handling of discord.Forbidden 90001 errors (caused by attempting to add a reaction to a message where the message author has blocked the bot) and uses it in all created schedules.

Approved by @ChrisLovering on Discord, so there's no github issue.

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[ChrisLovering]

We should bump the version in pyproject.toml and write a changelog entry too

[wookie184]

What's the benefit of this over adding the callback to the returned task?

[TizzySaurus]

What's the benefit of this over adding the callback to the returned task?

I'm not overly familiar with tasks, so you'd have to ask @ChrisLovering

EDIT:

The initial idea was for it to automatically add the handle_forbidden_from_block written in python-discord/bot#2580 to the task, but it seems I completely forgot about that when implementing 😅.

I think this means that the actual done_callbacks kwarg isn't required, and what is required, is the addition of handle_forbidden_from_block into bot-core, and the automatically adding it to tasks in create_task.