Multi-timezone support in Angular

[erdemcaygor]

Description

Resolves #22507

1. Clock Kind Unspecified

creationTime:  "2025-04-09T10:42:28.5420474"
lastModificationTime: "2025-04-09T11:28:15.7112714"

2. Clock Kind Utc and timezone "Europe/Istanbul"

creationTime: "2025-04-09T10:42:28.5420474Z"
lastModificationTime: "2025-04-09T11:28:15.7112714Z"

3. Clock Kind Utc and timezone Europe/Amsterdam

creationTime: "2025-04-09T10:42:28.5420474Z"
lastModificationTime: "2025-04-09T11:28:15.7112714Z"

4. Clock Kind Utc and timezone Europe/Helsinki

creationTime: "2025-04-09T10:42:28.5420474Z"
lastModificationTime: "2025-04-09T11:28:15.7112714Z"

Checklist

• I fully tested it as developer / designer and created unit / integration tests

How to test it?

Please describe how this can be tested by the test engineers if it is not already explicit - or remove this section if no need to description.

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[maliming]

hi @erdemcaygor @sumeyyeKurtulus

Can you add an Angular test app to this repo to show the timezone feature?

https://github.com/maliming/TimeZone

I will move it to https://github.com/abpframework/abp-samples when everything works.

Thanks.