Add support to read necessary info from Yaml config files for camera publisher / subscriber

Currently, the camera publisher / subscriber node has important parameters like frame rate, image format, etc hard coded into the code.
It would be much better if such parameters could be read from a YAML config file, similar to cameraserver and cameraview in JdeRobot

Start by locating the camera publisher and subscriber entry points and identifying the hard-coded parameters for frame rate, image format, and related settings. Compare their configuration approach with cameraserver and cameraview in JdeRobot; done means these parameters can be supplied through a YAML configuration file instead of only through code.

Written by the indexing model from the issue text.