feature(fabric): added fabric support (#491)

* Initial work towards Fabric compat. This does not compile yet

* Further updates - should compile but Gradle is being weird.

* Remove useless buildscript extras

* Added mixins to buildscript classpath to fix Loom crash

* Make it compile

* Got it building and added interaction

* Fixed review comments

* Use ServerPlayerEntity for FakePlayer

* Use method references for nicer names

* Fixed remaining comments and added networking for CUI

* Output as dist.jar

* Added mixins for left click air

* Use regex for cleanliness

worldedit-fabric/src/main/resources/pack.mcmeta

@@ -0,0 +1,6 @@
+{
+    "pack": {
+        "description": "WorldEdit Resources",
+        "pack_format": 4
+    }
+}