Integrate DelegateActionManager for request handling and refactor IPC:

- Replaced `SimpleProtocol` with `TransportProtocol` in `IPCManager`.
- Added `DelegateActionManager` to route requests to handlers, starting with `EchoHandler`.
- Updated `MediaManagerApplication` to initialize and manage `DelegateActionManager`.
- Extended Protocol Buffers schema with `Request` and `Response` definitions.
- Enhanced logging for request processing and redesigned response flow.

src/main/proto/messages.proto

@@ -1,9 +1,19 @@
 syntax = "proto3";
 
 option java_package = "com.mediamanager.protocol";
-option java_outer_classname = "SimpleProtocol";
+option java_outer_classname = "TransportProtocol";
+
 package mediamanager;
 
-message TextMessage {
-  string content = 1;  // O texto da mensagem
+message Request {
+  string request_id = 1;
+  bytes payload = 2;
+  map<string, string> headers = 3;
+}
+
+message Response {
+  string request_id = 1;
+  int32 status_code = 2;
+  bytes payload = 3;
+  map<string, string> headers = 4;
 }