fix: use aware datetimes everywhere

[shiftinv]

Enables DTZ rules, which require the use of timezone-aware datetimes everywhere. Previously some of the displayed times would've only been correct if the bot runs in UTC, since disnake assumes all naive datetimes are local time.

[shiftinv]

Welp, turns out this will only work on >=3.11. Earlier versions of fromisoformat don't actually parse iso8601-formatted strings, contrary to the name.

Alternatives include:

• arrow.get(t).datetime (56.7us)
• datetime.strptime(t, "%Y-%m-%dT%H:%M:%S%z") (8.1us)
  • note the %z instead of Z
• dateutil.parser.isoparse (5.2us)
  • arrow already depends on dateutil, fwiw

[onerandomusername]

Welp, turns out this will only work on >=3.11. Earlier versions of fromisoformat don't actually parse iso8601-formatted strings, contrary to the name.

Alternatives include:

* `arrow.get(t).datetime` (56.7us)

* `datetime.strptime(t, "%Y-%m-%dT%H:%M:%S%z")` (8.1us)
  
  * note the `%z` instead of `Z`

* `dateutil.parser.isoparse` (5.2us)
  
  * arrow already depends on dateutil, fwiw

feel free to use striptime or dateutil.parser. I think I'm already using datetime.strptime in the majority of places.

[shiftinv]

Fixed in https://github.com/onerandomusername/monty-python/pull/240/commits/38f73ddf768d48583b86b95e6f9c86461a384242.

[onerandomusername]

Could you please rebase with signed commits?

[shiftinv]

Could you please rebase with signed commits?

Done.