Implement permission changes

Created by: Lulalaby

Update Permissions to include newly documented Permission

Summary

Implements the following permissions to DSharpPlus.Permissions:

• SEND_MESSAGES_IN_THREADS
• CREATE_PUBLIC_THREADS (Replaces USE_PUBLIC_THREADS )
• CREATE_PRIVATE_THREADS (Replaces USE_PRIVATE_THREADS)
• USE_APPLICATION_COMMANDS (Replaces USE_SLASH_COMMANDS)

Details

Adds the following permissions to the Permissions enum.

• SendMessagesInThreads
• CreatePublicThreads
• CreatePrivateThreads
• UseApplicationCommands

Marked the following permissions as obsolete:

• UsePublicThreads
• UsePrivateThreads
• UseSlashCommands

Changes proposed

• Add Permissions.SendMessagesInThreads with a value of 0x0000004000000000

• Modify the FULL_PERMS and All values to the result of the old All value and all new values resulting to a new value of 549755813887

Notes

See https://github.com/discord/discord-api-docs/pull/3672