docs: update readme

Merge pull request #231 from HofNature/master

Change Fabric API url

Change VirtualBox download to the Old Builds 6.1 archive

Merge README.md from y2k04/MCVmComputers

Change Discord server link text to be a call-to-action

Add link to the official Discord server

Merge pull request #267 from MegaSa1nt/master

Russian translation

Revert "Merge pull request #215 from Delta2Force/1.17.1"

Revert "Updated build.gradle to include libraries in .jar"

Added Simplified Chinese Translation

Updated build.gradle to include libraries in .jar

Merge pull request #215 from Delta2Force/1.17.1

Update version to 1.4.16