Rudimentary hardware interface client

[LeStahL]

Integrate a command-line based hardware interface client in subfolder hardware-client/ that can

• connect to a server
• list midi connections available and notify the server with the information
• play midi tracks on the hardware on server request

[LeStahL]

feature branch is at https://github.com/LeStahL/cult210/tree/feature/include-hardware-client