oωo (owo-lib)

This build is primary a port of 0.12.9 to 1.21. This mandated a few other changes:

Endec changes

The Endec API is no longer built into owo-lib. Instead, owo now uses and ships the standalone endec library. This entails four major changes:

• Endecs for Minecraft's types are no longer found on BuiltInEndecs but instead on MinecraftEndecs
• DFU interop (namely, converting between codecs and endecs) is now handled through CodecUtils.toCodec/toEndec and related functions
• A number of package changes, primarly io.wispforest.owo.serialization -> io.wispforest.endec
• All JSON-related implementations are now named after the JSON library they use. In consequence, the previous JsonSerializer is now GsonSerializer and so on

Further Fixes

• EdmOps no longer uses null as its empty value, fixing a number of edge cases with particular types of DFU codecs when doing interop
• owo's ScreenHandler extensions don't require a HandledScreen anymore and now also support other screens which implement ScreenHandlerProvider