RFC: Refactor Quest System

[shawncplus]

Currently quests have to be written in a javascript file which is a pretty terrible experience for builders that aren't also programmers.

High level plans

Allow quests to be defined in a YAML file like items and npcs. This will allow for quests to be created entirely in Soma (assuming the required goal and reward type classes exist)

Implementation Details

Rewards

Quest#reward should be an array of QuestReward objects that have give and display methods.

Example reward types

• CurrencyReward
• ItemReward(array items) ** if items is an array render ItemUtil.displayItem by splitting two item displays on \r\n, looping over Max(item 1 arr len, item 2 arr len), use ''
• ExperienceReward
• ChoiceReward - A reward type that accepts an array<Reward> and will allow user to choose one of the rewards

Goals

Quest Goals should have the option to require completion in order and to only reveal subsequent goals when preceding goals are completed, e.g., travel to Room A, once that's done, Travel to Room B appears as the goal

Core changes

• quests.js should be replaced by quests.yml
• New bundle types: quest-rewards and quest-goals
• Update BundleManager to load in new reward and goal bundles, assign reward and goals to QuestFactory
• There will be some changes needed to QuestFactory#create for instantiating the goals and rewards
• QuestGoal should get a new static bool validate(config) method that is called during bundle load to halt server startup if there is a quest with a bad config

Bundle changes

• The ranvier-quests bundle will have to move the goals from lib to the new quest-goals bundle type
• ranvier-areas will have to rewrite the quests.js to the new format

[shawncplus]

Please test #315 for the proposed change