Jackson IO Library

[AterAnimAvis]

IO Jackson Implementation.

Based off #15 for the AdapterPresenceTest

TODO:

• Decide on the correct version for FeatherModule.VERSION
• Fix up docs on JacksonTest
• Potentially redesign the ignoreNonDocumented implementation
• Add more documentation :harold:.

Things noticed:

• ParameterData uses a signed byte for the index, should really be unsigned (0-255) Parameter indexes cannot be stored safely as bytes #10
• IllegalArgumentException used in places instead of JsonParseException/JsonDataException
• No tests for the Manifest?

Closes #12

[marchermans]

Just a question: What is the usage of this? I have no problem with adding it, but I want to know why we have this module.

[AterAnimAvis]

#12
Jackson happens to be the other leg of the main three JSON libraries for Java (GSON, Jackson, Moshi), I believe we also got a request for it at some point (looking into it slightly more, it was likely from someone making a Discord Bot since both JDA and Discord4J pull in jackson, although can't find the original message).
It semi serves as a good alternative for Moshi since that moved to Kotlin.