Set up run client and server directories, update def client username

Author: robotgryphon

build.gradle

@@ -30,14 +30,16 @@ minecraft {
     // These can be tweaked, removed, or duplicated as needed.
     runs {
         client {
-            workingDirectory project.file('run')
+            workingDirectory project.file('run/client')
 
             // Recommended logging data for a userdev environment
             property 'forge.logging.markers', '' // 'SCAN,REGISTRIES,REGISTRYDUMP'
 
             // Recommended logging level for the console
             property 'forge.logging.console.level', 'debug'
 
+            args '--username', 'Dev##'
+
             mods {
                 compactmachines {
                     source sourceSets.main
@@ -46,7 +48,7 @@ minecraft {
         }
 
         server {
-            workingDirectory project.file('run')
+            workingDirectory project.file('run/server')
 
             // Recommended logging data for a userdev environment
             property 'forge.logging.markers', '' // 'SCAN,REGISTRIES,REGISTRYDUMP'