Add conditional debug logging.

[san-rizz-777]

Changes made.

1. Added four debugPrint functions (overloaded) for taking various inputs, and replaced the "Serial.println" with the wrapper function.
2. Added the wrapper function "debugPrint" to reduce verbosity of multiple "ifdef and endif 's".
3. Added the defination of function and included "DEBUG" in the .hpp file.
4. Declaration and replacement was included in the .cpp source code.
5. Proper naming conventions followed and consistency was maintained.

Testing

1. Functions tested on the local machine they are working well without error.
2. Total code is working well.

#Aftereffects

1. Now user can toggle between debugging modes.
2. Less verbosity and better user experience.

Issue : - #6

[san-rizz-777]

@localrice Bro please review and tell if any changes to be made. Would be grateful , Thank you!

[san-rizz-777]

@localrice