Update Discord code for latest API and idiomatic C#

[thesprockee]

Update the Discord integration to support Discord's latest API version.

Tasks:

• Review and update all Discord API interactions for compatibility.
• Audit all structures/models for Discord requests/responses against official documentation.
• Refactor types and serialization to match Discord's recommended patterns, ensuring idiomatic usage for C#.
• Add links to updated Discord API docs for reference.
• Test changes for compatibility and reliability.

References:

• Discord API documentation

Please ensure the implementation is robust and maintainable.

[thesprockee]

this should fix #6