Implement memory monitoring and queue size reporting in MQTTBridge and CommonCLI

- Added `getQueueSize` method to `MyMesh` and `CommonCLI` for better queue management.
- Introduced memory logging functionality in `MQTTBridge` to monitor heap usage and detect potential memory leaks.
- Adjusted maximum queue size in `MQTTBridge` from 50 to 10 for improved resource management.
- Enhanced command handling in `CommonCLI` to report memory status upon request.

src/helpers/bridges/MQTTBridge.cpp

@@ -595,6 +595,7 @@ void MQTTBridge::publishPacket(mesh::Packet* packet, bool is_tx,
                                 float snr, float rssi) {
   if (!packet) return;
   
+<<<<<<< HEAD
   // Size-adaptive buffer: estimate needed size based on packet size
   // Most packets are <100 bytes (need ~400 byte JSON), large packets need ~1500 bytes
   int packet_size = packet->getRawLength();