Following important changes are being made here:
* color_class lib is removed since it not used anywhere now.
* We don't need the `dark_background` class since the background
color is already adjusted based on color scheme. So, all
instances of it being used is removed.
Implemented date localization using native Intl object.
Created special function get_localized_date_or_time_for_format
Made necessary string formatting changes in 'timerender.ts'.
Fixed tests and added some localization tests too.
Tested on my local development server, with some random languages.
Fixes#23987.
This lets us simplify the long-ish ‘../../static/js’ paths, and will
remove the need for the ‘zrequire’ wrapper.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Aman Agrawal
Anders Kaseorg
Daniil Fadeev