Add Fat Man and Detonator

Fat Man now added after sleep depriving model shading issues, which
turned out to be the fault of Forge's older shading pipeline. Enable
the experimental one in the forge-client config.
Detonator added for... detonating. Returns unique messages for
different errors.
Fat Man Kit added for quickly getting all components necessary for
detonation. Colors actually get generated and the implementation is not
going to become a huge ugly file when the project grows.
Gradle updated: 7.1 -> 7.2
Kotlin updated: 1.5.21 -> 1.5.30
Slightly improved Java interoperability, in case anyone will ever use
the API.

build.gradle

@@ -1,7 +1,7 @@
 buildscript {
     repositories {
-        maven { url = 'https://files.minecraftforge.net/maven' }
         mavenCentral()
+        maven { url = 'https://files.minecraftforge.net/maven' } // using it after central because they messed up their repo
     }
     dependencies {
         classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: '5.1.+', changing: true
@@ -208,15 +208,17 @@ repositories {
     mavenCentral()
 }
 
+def kotlinCompilerArgs = ["-Xopt-in=kotlin.RequiresOptIn", "-Xjvm-default=all"]
+
 compileKotlin {
     kotlinOptions {
         jvmTarget = "1.8"
-        freeCompilerArgs += "-Xopt-in=kotlin.RequiresOptIn"
+        freeCompilerArgs += kotlinCompilerArgs
     }
 }
 compileTestKotlin {
     kotlinOptions {
         jvmTarget = "1.8"
-        freeCompilerArgs += "-Xopt-in=kotlin.RequiresOptIn"
+        freeCompilerArgs += kotlinCompilerArgs
     }
 }

gradle.properties

@@ -5,6 +5,6 @@ org.gradle.daemon=false
 
 #versions
 mod_version=0.0.9.0
-kotlin_version=1.5.21
+kotlin_version=1.5.30
 jei_version=7.7.0.106
 mekanism_version=1.16.5-10.0.21.448

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -72,7 +72,7 @@ case "`uname`" in
   Darwin* )
     darwin=true
     ;;
-  MINGW* )
+  MSYS* | MINGW* )
     msys=true
     ;;
   NONSTOP* )