feat(plugins): minimal account API (#6554)

Co-authored-by: Mm2PL <mm2pl+gh@kotmisia.pl>
Reviewed-by: Mm2PL <mm2pl+gh@kotmisia.pl>

docs/lua-meta/globals.lua

@@ -54,6 +54,38 @@ c2.ChannelType = {
 
 -- End src/common/Channel.hpp
 
+-- Begin src/controllers/plugins/api/Accounts.hpp
+
+
+---@class c2.TwitchAccount
+c2.TwitchAccount = {}
+
+--- Returns true if the account this object points to is valid.
+--- If the object expired, returns false
+---
+---@return boolean success
+function c2.TwitchAccount:is_valid() end
+
+---@return string user_login The (login) name of the account
+function c2.TwitchAccount:login() end
+
+---@return string user_id The Twitch user ID of the account
+function c2.TwitchAccount:id() end
+
+---@return string? color Color in chat of this account. `nil` if not yet known
+function c2.TwitchAccount:color() end
+
+---@return boolean is_anon `true` if this account is an anonymous account (no associated Twitch user)
+function c2.TwitchAccount:is_anon() end
+
+---@return string str
+function c2.TwitchAccount:__tostring() end
+
+---Gets the currently logged in Twitch account. This account might be an anonymous one (see `is_anon`).
+---@return c2.TwitchAccount account
+function c2.current_account() end
+-- End src/controllers/plugins/api/Accounts.hpp
+
 -- Begin src/controllers/plugins/api/ChannelRef.hpp
 
 -- Begin src/providers/twitch/TwitchChannel.hpp