port 1.21.1

[dannykim2011]

No description provided.

[Groupix05]

Hey, thanks for this port ! For standardization, can you please do those changes :

• Use the com.dtteam groupid
• Use a build.gradle instead of a build.gradle.kts
• Use the same names in the gradle.properties as other addons

You don't need to use the addon lib in this addon, it has way too much custom stuff that are not in the addon lib.