feat: refactor client methods

- change `ProcessServerMessages` to use receiver instead of parameter
- update `Disconnect` method to use receiver for better encapsulation
- move `Client` definition to `connect.go`

🤖

internal/websocket/receive.go

@@ -11,13 +11,13 @@ import (
 
 var Done = make(chan struct{})
 
-func ProcessServerMessages(client Client, channel chan<- GoTomato.ServerMessage) {
+func (c Client) ProcessServerMessages(channel chan<- GoTomato.ServerMessage) {
 	var serverMessage GoTomato.ServerMessage
 
 	defer close(Done)
 
 	for {
-		_, message, err := client.Conn.ReadMessage()
+		_, message, err := c.Conn.ReadMessage()
 		if err != nil {
 			if websocket.IsCloseError(err, websocket.CloseNormalClosure) {
 				// Ignore normal closure and exit gracefully