refactor(agent): reorganize emulator command handling for gRPC support

- Removed direct inclusion of `emulator_commands.h` in non-gRPC contexts to streamline dependencies.
- Updated CMake configuration to conditionally include emulator command sources only when gRPC is enabled, enhancing modularity.
- Ensured consistent handling of emulator commands across different components.

Benefits:
- Improved code organization and maintainability by clarifying the inclusion of gRPC-related features.
- Enhanced flexibility in managing command handlers based on compilation flags.

src/cli/agent.cmake

@@ -41,7 +41,6 @@ set(YAZE_AGENT_SOURCES
   cli/handlers/game/dialogue_commands.cc
   cli/handlers/game/music_commands.cc
   cli/handlers/graphics/palette_commands.cc
-  cli/handlers/tools/emulator_commands.cc
   cli/handlers/game/message_commands.cc
   cli/handlers/graphics/sprite_commands.cc
   # ROM commands
@@ -56,6 +55,7 @@ if(YAZE_WITH_GRPC)
   list(APPEND YAZE_AGENT_SOURCES
     cli/service/agent/agent_control_server.cc
     cli/service/agent/emulator_service_impl.cc
+    cli/handlers/tools/emulator_commands.cc
   )
 endif()