Clean up build system

[FranKusmiruk]

Description

Right now, our build scripts are a bit of a mess, they do work but there's a lot of inconsistencies and repeated code in them. I am creating this issue so I don't forget what needs a change and also to receive input on things we could potentially improve in the overall building system.

As of now, the following changes are needed:

• Clean up the main build.gradle file:
  • Remove pointless usage of GStrings in some places.
  • Make the release tasks more object-oriented to avoid repeating code.
  • Remove uneeded repositories/dependencies.
  • Update dependencies (Probably make use of dependabot?)
  • Overall improvement of the code by making use of Groovy features.
  • Remove or update maven publish code. Consider making use of Github Packages as maven repository if we end up doing the latter.
• Update gradle wrapper (could probably automate this).
• Replace environment variables with configuration files or parametized tasks.
• Replace bash scripts with gradle tasks.
• Properly document or release cycle and any information needed for anyone to compile Skript.

Other things we may consider doing:

• Either update ECJ and configure it properly or completely getting rid of it.
• Target to newer Java versions.

That's basically all the issues I can recall as of now, if I forgot something or you have a suggestion, feel free to comment it here.

[TPGamesNL]

@FranKusmiruk this needs updating (or can be closed entirely)

[FranKusmiruk]

@FranKusmiruk this needs updating (or can be closed entirely)

marked off the finished tasks, there's still some stuff to tackle from the list though so not closing yet.

[TheLimeGlass]

Completed majority of these