Create basic ListCell for players

Create a basic ListCell for to display the data for players called a PlayerCell which will be the GUI representation of the Player class.

Required display data (no specific order):
* Image
* Name
* Class
* Race
* Level
* Alignment
* Languages
* Passive Perception
* Stats and modifiers
* Armor Class
* Inspiration
* Death Saves

Only a skeleton controller is needed, another issue will be to implement the controller fully. Also create an empty Player class.