[MQTT] Connect to HiveMQ broker and confirm connection

[ezehf2]

Install the paho-mqtt library and write a Python script that establishes a connection to the HiveMQ public broker at broker.hivemq.com on port 1883. The script should print a success message to the console when the connection is established and handle a failed connection gracefully with an error message. This is the foundation of the entire communication system — nothing else can be tested until this works.