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

[R-Sourabh]

Related Issues

hotwax/dxp-components#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)

• UPDATED UI

IMPORTANT NOTICE - Remember to add changelog entry

Contribution and Currently Important Rules Acceptance

• I read and followed contribution rules