feat(Message): implement new types

[Victorsitou]

Summary

implements https://github.com/discord/discord-api-docs/pull/6558

I wasn't able to get a message with type 39

Checklist

• [x] If code changes were made, then they have been tested
  • [x] I have updated the documentation to reflect the changes
  • [x] I have formatted the code properly by running pdm lint
  • [x] I have type-checked the code by running pdm pyright
• [ ] This PR fixes an issue
• [x] 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, ...)

[shiftinv]

I wasn't able to get a message with type 39

Should be f"{self.author.name} resolved an Activity Alert.", if you want to add that as well:

[Victorsitou]

Should be f"{self.author.name} resolved an Activity Alert.", if you want to add that as well:

Thank you so much!