Test enum vs String for questType

[Quazia]

Even though the questType is hardcoded as a string in the current struct, I still have a suspicion that leveraging an enum appended to the end of the struct would lead to some gas savings. Anywhere we can reduce or remove string types I'm always a proponent of.

For this issue we want to:

• Create a gas snapshot with the existing implementation (string based questType)
• Implement enum based questType
• Evaluate if the savings justifies switching over to enum based gas types