feat: 초기 프로젝트 설정 및 룰.md 파일 추가

api.hyungi.net/node_modules/dayjs/esm/plugin/isToday/index.d.ts

@@ -0,0 +1,10 @@
+import { PluginFunc } from 'dayjs/esm'
+
+declare const plugin: PluginFunc
+export = plugin
+
+declare module 'dayjs/esm' {
+  interface Dayjs {
+    isToday(): boolean
+  }
+}

api.hyungi.net/node_modules/dayjs/esm/plugin/isToday/index.js

@@ -0,0 +1,9 @@
+export default (function (o, c, d) {
+  var proto = c.prototype;
+
+  proto.isToday = function () {
+    var comparisonTemplate = 'YYYY-MM-DD';
+    var now = d();
+    return this.format(comparisonTemplate) === now.format(comparisonTemplate);
+  };
+});