feat: guild endpoints

[EmmmaTech]

https://discord.com/developers/docs/resources/guild

• [x] Create Guild
• [x] Get Guild
• [x] Get Guild Preview
• [x] Modify Guild
• [x] Delete Guild
• [x] Get Guild Channels
• [x] Create Guild Channel
• [x] Modify Guild Channel Positions
• [x] List Active Guild Threads
• [x] Get Guild Member
• [x] List Guild Members
• [x] Search Guild Members
• [x] Add Guild Member (OAuth endpoints will be added in later)
• [x] Modify Guild Member
• [x] Modify Current Member
• Modify Current User Nick (deprecated endpoint)
• [x] Add Guild Member Role
• [x] Remove Guild Member Role
• [x] Remove Guild Member
• [x] Get Guild Bans
• [x] Get Guild Ban
• [x] Create Guild Ban
• [x] Remove Guild Ban
• [x] Get Guild Roles
• [x] Create Guild Role
• [x] Modify Guild Role Positions
• [x] Modify Guild Role
• [x] Modify Guild MFA Level
• [x] Delete Guild Role
• [x] Get Guild Prune Count
• [x] Begin Guild Prune
• [x] Get Guild Voice Regions
• [x] Get Guild Invites
• [x] Get Guild Integrations
• [x] Delete Guild Integration
• [x] Get Guild Widget Settings
• [x] Modify Guild Widget
• [x] Get Guild Widget
• [x] Get Guild Vanity URL
• [x] Get Guild Widget Image
• [x] Get Guild Welcome Screen
• [x] Modify Guild Welcome Screen
• [x] Modify Current User Voice State
• [x] Modify User Voice State

[EmmmaTech]

Completed in 999576e.