Trying to make Project Korra addon moves work

So I've been trying to get the different custom moves people have made on project korra forums but I can't seem to do it because aternos doesn't allow to make jar files or upload your own. I've tried everything and I tried to copy paste the code into a file but It still won't work.

Can anybody help me or is this impossible?

For reference https://projectkorra.com/forum…es/terrasense-redone.369/

Quote from Henery

That's impossible to do. Copying the code into plain text doesn't make the plugin work.

So is it possible at all to add the custom moves in? Sorry I'm super new