* Converted EEPROM library to use nvs instead of partition. Removed eeprom partition from all partition table CSV files.
* Changed variable names, added some comments, formatting as per me-no-dev's requests
* Checks for memory on malloc
* Moved include nvs.h from header to code
* Reworked the extra example to make it more clear how to actually use the library and persist data
* add missing EEPROM lib to CMakeLists.txt, moved the EEPROM files to proper directory
* add missing EEPROM lib to CMakeLists.txt, moved the EEPROM files to proper directory
