Add publishing to Modrinth and Curseforge to Github Action (the current one or a new one). This can simplify the publishing and omit manual uploading.

Example:
https://github.com/rikka0w0/wsmc/blob/main/.github/workflows/publish.yml

In recent pulls, I changed \n to \\n in fabric/src/main/resources/fabric.mod.json and quilt/src/main/resources/quilt.mod.json.
Prevent \n being recognized as a newline character during Java compilation in fabric and quilt.

Which tokens do I need to add?

I'll go research how to use Kir-Antipov/mc-publish.

I have added MODRINTH_TOKEN for modrinth.com and CURSEFORGE_TOKEN for curseforge.com

I have added publish to Modrinth and Curseforge use Github Action.