velocityTool to add current time function

src/main/java/com/shuzijun/leetcode/plugin/utils/VelocityTool.java

@@ -1,6 +1,9 @@
 package com.shuzijun.leetcode.plugin.utils;
 
 import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.time.DateFormatUtils;
+
+import java.util.Date;
 
 /**
  * @author shuzijun
@@ -76,4 +79,13 @@ public static String snakeCaseName(String underscoreName) {
             return underscoreName;
         }
     }
+
+    public static String date() {
+            return date("yyyy-MM-dd HH:mm:ss");
+    }
+
+    public static String date(String format) {
+        return DateFormatUtils.format(new Date(), format);
+    }
+
 }

src/main/resources/i18n/info.properties

@@ -34,7 +34,7 @@ report=Report to plugin developer
 donate.info=Donation
 updata=Leetcode Editor new version {0} is found. Please update the plugin
 user.email=YOU HAVE NOT VERIFIED YOUR ACCOUNT\nYou cannot submit your code to the judge system until you verify your email.\nYou may resend the verification email or change your email in your profile page.
-template.variable=${0}question.title{1}\tquestion title\tex:Two Sum\n${0}question.titleSlug{1}\tquestion title slug \tex:two-sum\n${0}question.frontendQuestionId{1}\tquestion serial number\n${0}question.content{1}\tquestion content\n${0}question.code{1}\tquestion code\n$!velocityTool.camelCaseName(str)\ttransform str camel case\n$!velocityTool.snakeCaseName(str)\ttransform str snake case\n$!velocityTool.leftPadZeros(str,n)\tpad sting with zero make str length at least n.
+template.variable=${0}question.title{1}\tquestion title\tex:Two Sum\n${0}question.titleSlug{1}\tquestion title slug \tex:two-sum\n${0}question.frontendQuestionId{1}\tquestion serial number\n${0}question.content{1}\tquestion content\n${0}question.code{1}\tquestion code\n$!velocityTool.camelCaseName(str)\ttransform str camel case\n$!velocityTool.snakeCaseName(str)\ttransform str snake case\n$!velocityTool.leftPadZeros(str,n)\tpad sting with zero make str length at least n.\n$!velocityTool.date()\tThe current time
 tree.load=Please load questions first
 tree.null=Questions returned are empty
 tree.select=Please select a valid question in the list

src/main/resources/i18n/info_zh.properties

@@ -34,7 +34,7 @@ report=\u5411\u63D2\u4EF6\u4F5C\u8005\u62A5\u544A
 donate.info=\u6253\u8D4F
 updata=leetcode editor\u65B0\u7248\u672C {0} \u53D1\u5E03,\u8BF7\u53CA\u65F6\u66F4\u65B0
 user.email=\u60A8\u5C1A\u672A\u9A8C\u8BC1\u81EA\u5DF1\u7684\u5E10\u6237\n\u5728\u9A8C\u8BC1\u7535\u5B50\u90AE\u4EF6\u4E4B\u524D\uFF0C\u60A8\u65E0\u6CD5\u5C06\u4EE3\u7801\u63D0\u4EA4\u7ED9\u8BC4\u5224\u7CFB\u7EDF\u3002\n\u60A8\u53EF\u4EE5\u5728\u4E2A\u4EBA\u8D44\u6599\u9875\u9762\u4E2D\u91CD\u65B0\u53D1\u9001\u9A8C\u8BC1\u7535\u5B50\u90AE\u4EF6\u6216\u66F4\u6539\u7535\u5B50\u90AE\u4EF6\u3002
-template.variable=${0}question.title{1}\t\u9898\u76EE\u6807\u9898\t\u793A\u4F8B:\u4E24\u6570\u4E4B\u548C\n${0}question.titleSlug{1}\t\u9898\u76EE\u6807\u8BB0\t\u793A\u4F8B:two-sum\n${0}question.frontendQuestionId{1}\t\u9898\u76EE\u7F16\u53F7\n${0}question.content{1}\t\u9898\u76EE\u63CF\u8FF0\n${0}question.code{1}\t\u9898\u76EE\u4EE3\u7801\n$!velocityTool.camelCaseName(str)\t\u8F6C\u6362\u5B57\u7B26\u4E3A\u9A7C\u5CF0\u6837\u5F0F\n$!velocityTool.snakeCaseName(str)\t\u8F6C\u6362\u5B57\u7B26\u4E3A\u86C7\u5F62\u6837\u5F0F\n$!velocityTool.leftPadZeros(str,n)\tpad sting with zero make str length at least n.
+template.variable=${0}question.title{1}\t\u9898\u76EE\u6807\u9898\t\u793A\u4F8B:\u4E24\u6570\u4E4B\u548C\n${0}question.titleSlug{1}\t\u9898\u76EE\u6807\u8BB0\t\u793A\u4F8B:two-sum\n${0}question.frontendQuestionId{1}\t\u9898\u76EE\u7F16\u53F7\n${0}question.content{1}\t\u9898\u76EE\u63CF\u8FF0\n${0}question.code{1}\t\u9898\u76EE\u4EE3\u7801\n$!velocityTool.camelCaseName(str)\t\u8F6C\u6362\u5B57\u7B26\u4E3A\u9A7C\u5CF0\u6837\u5F0F\n$!velocityTool.snakeCaseName(str)\t\u8F6C\u6362\u5B57\u7B26\u4E3A\u86C7\u5F62\u6837\u5F0F\n$!velocityTool.leftPadZeros(str,n)\tpad sting with zero make str length at least n.\n$!velocityTool.date()\t\u83B7\u53D6\u5F53\u524D\u65F6\u95F4
 tree.load=\u8BF7\u5148\u52A0\u8F7D\u9898\u76EE
 tree.null=\u83B7\u53D6\u9898\u76EE\u4E3A\u7A7A
 tree.select=\u8BF7\u5728\u5217\u8868\u4E2D\u9009\u62E9\u4E00\u4E2A\u6709\u6548\u7684\u9898\u76EE