Made properties editable via gradle.properties

- There should be little incentive to touch `build.gradle`other than adding extra deps

gradle.properties

@@ -1,3 +1,18 @@
 # Sets default memory used for gradle commands. Can be overridden by user or command line properties.
 # This is required to provide enough memory for the Minecraft decompilation process.
-org.gradle.jvmargs=-Xmx3G
+org.gradle.jvmargs = -Xmx3G
+
+# Mod Information
+mod_version = 1.0
+maven_group = com.cleanroommc
+archives_base_name = modid
+
+# Boilerplate Options
+use_mixins = false
+use_coremod = false
+use_assetmover = false
+
+pack_mixins_in_jar = false
+
+# Coremod Arguments
+coremod_plugin_class_name =