feat: 添加新模块的基础类和主应用类

添加了多个基础服务类和视图模型类，包括SysConfViewModel、CompanyConstant等
实现了客户端和服务端的主应用类，包含启动配置和默认连接参数

client/src/main/java/com/ecep/contract/ClientV2.java

@@ -0,0 +1,14 @@
+package com.ecep.contract;
+
+import javafx.application.Application;
+
+/**
+ * Created by Administrator on 2017/4/16.
+ */
+public class AppV2 {
+    public static void main(String[] args) {
+        Application.launch(Desktop.class, args);
+    }
+
+    public static final String DEFAULT_HOST = "10.84.209.154";
+}