Add NPC Entity Types: Arrow & Fishing Hook

[xcodian]

I confirm that I have ...

• ...tried the latest Development Build to make sure my feature doesn't exist already.
• ...checked the Wiki for any possible information about my feature.
• ...checked other existing issues for my feature request.

Description

Citizens should allow you to create an NPC of entity type ARROW and FISHING_HOOK. Currently, an internal error is thrown whenever you try to use these types.

• Allows using the existing pathfinding code to create things like a following flying arrow.
• Coverage for more entity typea in the Minecraft server, which is always good!

Code Example

No response

[mcmonkey4eva]

All entity types are spawnable. If there's a bug with any, report it as a bug.
Fishing hook NPCs being broken is already a tracked bug: #1702