[added] pet feed command (eats first food in inventory)
[added] pet feeding heals 10% health/action wounds
[added] 5s cooldown between feedings
[refactored] droid recharge to pet command framework

Change-Id: Ia7aec08327295ed39229081ac62f4f69b9e581eb
Merge "[added] pet feed command (eats first food in inventory) [added] pet feeding heals 10% health/action wounds [added] 5s cooldown between feedings [refactored] droid recharge to pet command framework" into unstable