toolkit-use npm package have added some functions

<script setup lang="ts">
import { ToolkitUseDate } from "toolkit-use/dist/date/index.esm"

const date = new Date()

const str = ToolkitUseDate.formatDate(date, 'yyyy-MM-dd HH:mm:ss')
</script>

import { ToolkitUseDate } from "toolkit-use/dist/date/index.esm"
ToolkitUseDate.isLeap(year: number)

import { ToolkitUseDate } from "toolkit-use/dist/date/index.esm"
ToolkitUseDate.getWeek( …