feat(webhook): add applied_tags parameter

[shiftinv]

Summary

Executing a webhook in a forum channel now supports setting applied_tags on thread creation (using thread_name).

discord/discord-api-docs@4060a74

Checklist

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