Implemented: timeZone switcher component from dxp package(dxp/262)

[R-Sourabh]

Related Issues

https://github.com/hotwax/dxp-components/issues/262

Short Description and Why It's Useful

• Integrated the timeZone component from dxp-component into the application.
• Removed the setUserTimeZone and getAvailableTimeZones methods from userService and started using them from @hotwax/oms-api.
• Enhanced the setUserTimeZone action, making it synchronous for improved functionality.
• Updated the settings section by replacing the timeZone settings and incorporating the DxpTimeZoneSwitcher component from dxp-components.
• Updated the UI to display both the selected timezone and the browser timezone.

Screenshots of Visual Changes before/after (If There Are Any)

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Contribution and Currently Important Rules Acceptance

• [x] I read and followed contribution rules