Feature/build-script (#11)

* Comment build script and one-line all JSON files

* Add note to readme for building w/o one-lining, and update implements

* Resolve merge conflict and update build script

- Resolve merge conflict
- Edit Jenkinsfile with new script arguments
- Default build script to not apply whitespace removal (use -jc to apply it)

* Add link back to repo in case people find this in the wild

* Fix comment typo

* Fix comment (./prepare_pack.sh -jc)

README.md

@@ -1,12 +1,15 @@
 # GeyserOptionalPack
 
-Optional Bedrock resource pack to extend Geyser functionality
+Optional Bedrock resource pack to extend Geyser functionality. Learn more at [GeyserMC/GeyserOptionalPack](https://github.com/GeyserMC/GeyserOptionalPack).
 
 ### Implements
 
 - Armor base arms/baseplate visibility
 - Armor stand poses
+- Illusioners
 - Iron golem cracked textures
+- Missing particles
+- Offhand animations
 - Shulker invisibility parity
 - Spectral arrow entity texture
 
@@ -14,7 +17,7 @@ Currently is not in use yet. Stay tuned!
 
 ### Manually building
 
-Run `copy_java_files_to_pack.sh` in this directory and the necessary files from the vanilla jar will be copied to the required directories. Zip up and you're set.
+Run `./prepare_pack.sh` in this directory and the necessary files from the vanilla jar will be copied to the required directories. Zip up and you're set. Optionally, you may compress the output JSON files by running `./prepare_pack.sh -jc`. This should not be done when planning to contribute. You may then package with `zip GeyserOptionalPack.mcpack -r . -x ".*" Jenkinsfile required_files.txt prepare_pack.sh`.
 
 ### Legal