MidnightLib v0.2.0 for 21w19a

- MidnightConfig screens can be viewed from a new screen in the minecraft options
- Code cleanup
- Examples & Documentation
- New Methods
- Upgrade to 21w19a and Java 16

MidnightConfig v1.0.0:
 - The config screen no longer shows the entries of all instances of MidnightConfig
 - Compatible with servers!
 - Scrollable!
 - Comment support!
 - Fresh new design

src/main/resources/midnightcore.mixins.json

@@ -0,0 +1,11 @@
+{
+  "required": true,
+  "package": "eu.midnightdust.core.mixin",
+  "compatibilityLevel": "JAVA_8",
+  "client": [
+    "MixinOptionsScreen"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}