Refractor & Removal of Redundant Versions

Changes:

Important

Since version 1.17.1 Spigot changed the layout and obfucation mapping method, so this tool only compiles from version 1.8 to 1.17.
If you need support for version 1.18 and above please check out tekanaka.
I will try to find a way to include everything but nothing is promised.

Additions

• Added action to publish a new version to github packages.
• Added internet connection check.
• Added error checks. e.g. when Java path is not set.
• Added test to run it on github actions.
• Added auto build & publish to github packages.
• Added more flags:
  • -t - Tests that the tool works as expected and everything is included on the out jar file.
  • -k - Removes title printout
  • -x - Disables verbose out put. Only important info will be displayed.

Fixes

• Fixed #10
• Fixed issues with jar command not being found correctly.

Other

• Cleaned up code for more readability.
• Cleaned and merged the README.md files.
• Removed spigot_versions/ and extracted_files/.
• Re-render the menu after running a command.
• Removed version 1.18 and up do to changes on the Spigot mappings.
  Full Changelog: v1.4...v1.6