Adventure: Complete the adventure

[Joo200]

The adventure was once started by @octylFractal . After some time I compressed the adventure with a piston and this is the result:

• Updated the started adventure branch to adventure 4.14.0
• Improved the usage of adventure at some points
• Remove the legacy kyori text module from piston
• Improved gradle build scripts by using some worldedit methods.

It's not possible to compile piston with jdk11+, I used jdk8 to compile and publish it to mavenLocal.