refactor: create @louffee/date package

This commit introduces the `@louffee/date` package, which is a utility
package for working with dates by adapting the API from the `dayjs` NPM
package.

See further details in the `dayjs` package on their official website:
https://day.js.org/

Author: mrlemoos

packages/date/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "@louffee/date",
+  "version": "0.0.0",
+  "private": true,
+  "main": "./src/index.ts",
+  "types": "./src/index.ts",
+  "homepage": "https://github.com/louffee/louffee.co/tree/main/packages/testing-library-ext",
+  "dependencies": {
+    "dayjs": "^1"
+  }
+}

packages/date/src/index.ts

@@ -0,0 +1,20 @@
+import dayjs, { Dayjs, type FormatObject } from 'dayjs'
+
+/**
+ * The `date()` function creates a new instance of the `DateHandler` class,
+ * which is a wrapper around the `dayjs` library.
+ *
+ * @see https://day.js.org
+ * @see https://npmjs.com/package/dayjs
+ */
+const date = dayjs
+
+/**
+ * The `DateHandler` is the class representing the date handler which is the
+ * product of the {@link date | `date()`} function.
+ */
+export const DateHandler = Dayjs
+
+export type { FormatObject }
+
+export default date