GH-456 Improve Fabric

[huanmeng-qwq]

Fix cannot be executed when only literal
Implemented support for the client side
Support v1 version commands API

[huanmeng-qwq]

Ok.

[Rollczi]

Hi @huanmeng-qwq,
Thanks for your contribution! I added code style adjustments and fixed for example. Can you check if everything works with your expectations after my changes?

[huanmeng-qwq]

I have completed the modifications, and the following is my explanation of the changes:

• The entrypoints.entrypoints in fabric.mod. json point to an incorrect class
• I noticed that you added the Environment annotation to the server environment class, which is unnecessary because there are only environments with Server or Client+Server, and there is no environment with only Client
  • In other words, the content of the server environment can still be used in the entry ModInitializer. It is a universal entry point. The loading order of fabric is: main->client, main->server. The normal launcher starts the game client in the first order. One (client.jar contains the content of the server, so it can be loaded in main), and when starting the server, only the content of the server environment exists, so we need to use the Environment annotation to remove the content of the client environment (at this time, the main entry point will Unable to use the content of the client). To sum up, if we write the client command and the server command in the main at the same time, they can all be loaded in the local world (SSP).
• Since Vanilla already has a ban command, I modified the BanCommand

[Rollczi]

Thanks for your the correction and PR ❤️