[Editor] Enable creating and filling class with predefined FTL templates on project and class creation

editor/src/main/resources/application.yml

@@ -1,3 +1,7 @@
 logging:
   level:
-    com.bartlomiejpluta.base.editor: DEBUG
+    com.bartlomiejpluta.base.editor: DEBUG
+
+spring:
+  freemarker:
+    checkTemplateLocation: false

editor/src/main/resources/java_templates/empty_class.ftl

@@ -0,0 +1,5 @@
+package ${package};
+
+public class ${className} {
+
+}

editor/src/main/resources/java_templates/game_runner.ftl

@@ -0,0 +1,5 @@
+package ${package};
+
+public class ${className} {
+
+}