External Chat Linking (!4)

This PR adds the functionality for plugins to send and recieve messages linked to a specific channel.

Co-authored-by: Layla <layla@layla.gg>
Reviewed-on: https://gitea.sumulayla.synology.me/layla/birdbot/pulls/4

common/chat_sync.go

@@ -1,6 +0,0 @@
-package common
-
-type ChatSyncModule interface {
-	SendMessage(user string, message string)
-	RecieveMessage(user User, message string)
-}

common/external_chat.go

@@ -0,0 +1,11 @@
+package common
+
+type ExternalChatManager interface {
+	SendMessage(user string, message string)
+}
+
+type ExternalChatModule interface {
+	Initialize(ExternalChatManager)
+
+	RecieveMessage(user User, message string)
+}

common/module.go

@@ -24,5 +24,6 @@ type ModuleManager interface {
 	// Commands
 	RegisterCommand(string, ChatCommandConfiguration, func(User, map[string]any) string)
 
-	RegisterChatSyncModule(ID string, plugin ChatSyncModule) error
+	// Submodules
+	RegisterExternalChat(channelID string, chat ExternalChatModule) error
 }