Add camera-client as a configrable camera-type

[miyatakazuya]

The config.camera.type allows us to configure which camera is being used at runtime in obc.cpp. This feature current does not support the new udp-client. On top of that, the camera intrinsics + serveral other configs are hardcoded in rp_connection.hpp.

TODO:

• Work off branch /feat/pi-client
• Prune rp_connection.hpp to avoid hard-coding of configs (resolution, buffer, ip, port, etc.)
  • Some stuff will be static/constant so they can be hardcoded elsewhere (headerSize, magic, chunk, header struct, etc.)
• Modify rpi.cpp to utilize CameraConfig over hard-coded values in rpi_connection.hpp