Create player Obj

[NathanaelWhite]

• Player obj will used to to store methods and properties related to the user's character

Player properties are as follows:

• name
• health
• strength
• agility
  Player methods are as follows:
• getStats()
• getInventory()
• getHealth()
• getAttackValue()
• isAlive()
• addPotion()
• usePotion()
• reduceHealth()

• Write tests for the Player() constructor and methods