[DEV] Fix some jenkins configs (#10)

* [no-orbit] [DEV] Fix some jenkins configs

* [DEV] Fix Patches and use correct MCFormatter versions for older MC versions

* [CHORE] Update readme and remove GitHub action

---------

Co-authored-by: fdd-orbit <orbit@firstdark.dev>
Co-authored-by: hypherionmc <hypherionmc@gmail.com>

patches/1.18.2/README.md.patch

@@ -0,0 +1,11 @@
+--- a/README.md
++++ b/README.md
+@@ -15,7 +15,7 @@
+ | < 1.18.2          | ❌              |
+ | 1.18.2-1.20.2     | ✳️             |
+ | 1.20.4            | ✳️             |
+-| 1.20.6            | 🚧             |
++| 1.21              | 🚧             |
+ 
+ - ❌ - Not Supported; no bug fixes or new features.
+ - 🚧 - Work in Progress; not ready for release.