import IIngredient (#352)

Author: WaitingIdly

src/main/java/com/cleanroommc/groovyscript/sandbox/GroovyScriptSandbox.java

@@ -63,6 +63,7 @@ public GroovyScriptSandbox() {
 
         getImportCustomizer().addStaticStars(GroovyHelper.class.getName(), MathHelper.class.getName());
         getImportCustomizer().addImports(
+                "com.cleanroommc.groovyscript.api.IIngredient",
                 "net.minecraft.world.World",
                 "net.minecraft.block.state.IBlockState",
                 "net.minecraft.block.Block",