feat: 초기 프로젝트 설정 및 룰.md 파일 추가

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

@@ -0,0 +1,10 @@
+import { PluginFunc, ConfigType, OpUnitType } from 'dayjs/esm'
+
+declare const plugin: PluginFunc
+export = plugin
+
+declare module 'dayjs/esm' {
+  interface Dayjs {
+    isBetween(a: ConfigType, b: ConfigType, c?: OpUnitType | null, d?: '()' | '[]' | '[)' | '(]'): boolean
+  }
+}

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

@@ -0,0 +1,10 @@
+export default (function (o, c, d) {
+  c.prototype.isBetween = function (a, b, u, i) {
+    var dA = d(a);
+    var dB = d(b);
+    i = i || '()';
+    var dAi = i[0] === '(';
+    var dBi = i[1] === ')';
+    return (dAi ? this.isAfter(dA, u) : !this.isBefore(dA, u)) && (dBi ? this.isBefore(dB, u) : !this.isAfter(dB, u)) || (dAi ? this.isBefore(dA, u) : !this.isAfter(dA, u)) && (dBi ? this.isAfter(dB, u) : !this.isBefore(dB, u));
+  };
+});