✨ [Feature]: 希望CalendarView日历视图的自定义单元格背景色能够自定义背景颜色

[stwflyfox]

What problem does this feature solve

目前只有预置的颜色, 希望可以自定义颜色。

What does the proposed API look like

none

What is your project name

shqy

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

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Title: ✨ [Feature]: I hope that the custom cell background color of the CalendarView calendar view can be customized.