提交初始版本，使用vant ui库

miniprogram_npm/@vant/weapp/count-down/utils.d.ts

@@ -0,0 +1,10 @@
+export type TimeData = {
+    days: number;
+    hours: number;
+    minutes: number;
+    seconds: number;
+    milliseconds: number;
+};
+export declare function parseTimeData(time: number): TimeData;
+export declare function parseFormat(format: string, timeData: TimeData): string;
+export declare function isSameSecond(time1: number, time2: number): boolean;