feat: rework server class

[Droid00000]

Summary

This PR re-works the server class (no breaking changes). Since we're not in a major version, I was really careful to not do any breaking changes (even though the diff looks pretty horrible), but I did mark a few things as @deprecated doc-wise since there are now better replacements for them.

Added

Emoji#modify
Emoji#delete

Server::SYSTEM_CHANNEL_FLAGS

Server#kick!
Server#ban!
Server#unban!
Server#bulk_ban!
Server#audit_log
Server#create_emoji
Server#prune_count!
Server#query_members
Server#prune_members
Server#create_channel!
Server#join_notifications?
Server#boost_notifications?
Server#reminder_notifications?
Server#join_notification_replies?
Server#role_subscription_notifications?
Server#role_subscription_notification_replies?

request: KWARG for Server#role
style: KWARG for Server#widget_url
bypass_cache: KWARG for Server#roles
bypass_cache: KWARG for Server#emojis
bypass_cache: KWARG for Server#channels
American color params for Server#create_role
flags: KWARG for Server#add_member_using_token

increment KWARG to Server#cache_member

size KWARG for ServerAttributes#icon_url
size KWARG for Server#splash_url
size KWARG for Server#banner_url
size KWARG for Server#emoji_icon_url
size KWARG for Server#discovery_splash_url

size argument for API#icon_url
size argument for API#splash_url
size argument for API#banner_url
size argument for API#emoji_icon_url
size argument for API#discovery_splash_url

API::Channel#create!
API::Server#list_active_threads
API::Server#create_role!
API::Server#get_server_prune_count
API::Server#begin_server_prune
API::Server#get_audit_log
API::Server#list_emojis
API::Server#get_emoji
API::Server#create_emoji
API::Server#update_emoji

Changed

• All channels are now stored internally in a hash per-server, and serialized to an array when the attribute is called.

• The name of Server#add_role was changed to Server#cache_role

• The name of Server#add_channel was changed to Server#cache_channel

• The name of Server#cache_widget_data was changed to Server#cache_widget

Deprecated

Server#any_emoji?
Server#max_emoji
Server#widget_enabled=
Server#set_widget_enabled
Server#widget_channel=
Server#set_widget_channel
Server#modify_widget
Server#name=
Server#icon=
Server#afk_channel=
Server#system_channel=
Server#afk_timeout=
Server#verification_level=
Server#default_message_notifications=
Server#explicit_content_filter=
Server#text_channels
Server#voice_channels
Server#widget_banner_url
Server#create_channel
Server#bans
Server#add_emoji
Server#delete_emoji
Server#search_members
Server#edit_emoji
Server#begin_prune
Server#prune_count
Server#region
Server#region=
Server#move
Server#unban
Server#kick
Server#ban
Server#bulk_ban

VoiceRegion#vip
VoiceRegion#sample_port
VoiceRegion#sample_hostname

Removed

Emoji#process_roles
Server#add_member
Server#member_cached?
Server#update_emoji_data

Fixed

• @vanity_url_code was fixed to @vanity_invite_code