[feature] System time zone optimization.

[Duansg]

What's changed?

Please refer to: #3576

System time zone optimization.

For details:

1. Added a quick search function for the system time zone to resolve issues with selecting time zones from a drop-down menu.
2. The time zone is obtained from the backend, which retrieves all available time zones. It returns a set of all time zone names supported by the current JDK tzdata database, dynamically calculates adaptive daylight saving time (DST), and all IANA standard time zones. For reference, see ZoneId.
3. Added internationalization support. The front-end display now shows timezone id + ' (' + timezone offset + ') ' + i18n display Name, which supports searching.

Effect display

Checklist

• I have read the Contributing Guide
• I have written the necessary doc or comment.
• I have added the necessary unit tests and all cases have passed.

Add or update API

• I have added the necessary e2e tests and all cases have passed.

International exhibition

[tomsun28]

LGTM.