feat: 초기 프로젝트 설정 및 룰.md 파일 추가

api.hyungi.net/node_modules/dayjs/plugin/relativeTime.d.ts

@@ -0,0 +1,24 @@
+import { PluginFunc, ConfigType } from 'dayjs'
+
+declare interface RelativeTimeThreshold {
+  l: string
+  r?: number
+  d?: string
+}
+
+declare interface RelativeTimeOptions {
+  rounding?: (num: number) => number
+  thresholds?: RelativeTimeThreshold[]
+}
+
+declare const plugin: PluginFunc<RelativeTimeOptions>
+export = plugin
+
+declare module 'dayjs' {
+  interface Dayjs {
+    fromNow(withoutSuffix?: boolean): string
+    from(compared: ConfigType, withoutSuffix?: boolean): string
+    toNow(withoutSuffix?: boolean): string
+    to(compared: ConfigType, withoutSuffix?: boolean): string
+  }
+}