Support Gin theme dark mode

Work in progress in 2.2.x.

Need to review dark mode variables from Gin and choose which ones to use in our own stylesheet.

@hey sourabh , can you please use the specific color code here instead of mentioning the color variables of gin because again we have to search for that color code in the gin theme. Just create some color variables along with that color code of gin in the file named calendar-view.example.css instead of creating in this file calendar-view.default.css.

Thank you for this issue and for the work done.

I've updated the default stylesheet with basic styling using CSS variables from Gin.

We won't do much on 2.1.x because there is a rework being done in 2.2.x and all CSS files will be reworked anyway.

The Calendar View table looks better with Gin dark mode now:

Marking this issue as fixed.

Automatically closed - issue fixed for 2 weeks with no activity.