[Feature request]: NScrollbar customize position, width and height

[cnguu]

This function solves the problem (这个功能解决的问题)

It is difficult for the user to select the scrollbar

Expected API (期望的 API)

App.vue

<script>
import { defineComponent } from "vue";
import { NConfigProvider } from "naive-ui";

export default defineComponent({
  components: {
    NConfigProvider,
  },
  setup() {
    const themeOverrides = {
      common: {
        scrollbarWidth: 6,
        scrollbarHeight: 6,
        scrollbarBorderRadius: 4,
        scrollbarBackgroundColor: "rgba(144, 147, 153, 0.3)",
        scrollbarTop: 0,
        scrollbarRigth: 0,
        scrollbarBottom: 0,
        scrollbarLeft: 0,
      },
    };

    return { themeOverrides };
  },
});
</script>

<template>
  <NConfigProvider :theme-overrides="themeOverrides" />
</template>

[Talljack]

NScrollbar is not open, if you need use please read the code yourself

[07akioni]

NScrollbar is not open, if you need use please read the code yourself

我们还是可以给几个主题的定制变量的

[Talljack]

NScrollbar is not open, if you need use please read the code yourself

我们还是可以给几个主题的定制变量的

好的