Fixes #FINCN-326 Create, update, list tellers and Teller Details implemented

[varsvat]

Fixes FINCN-326 and FINCN-327

Creating, Editing, updating Teller functionality Implemented through MVVM architecture. Teller Details Screen has also been implemented. UI tests for various text fields have also been integrated.

Edit: Support for Task management features have also been extended.

This PR adds support for the following functionalities and improvements:

1. Creating Tellers
2. Editing and updating existing Tellers
3. Teller details screen
4. Teller List screen
5. Support for Task management features like closing, reopening, and activating the Tellers.

The UI for all the screens has been tried to keep as similar as possible to maintain uniformity of UI in the app.

Teller_Functionalities_implemented.mp4

Task management features:

Fix.327.mp4

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[varsvat]

@jawidMuhammadi Please take a look at this PR whenever you get time.

[jawidMuhammadi]

Awesome job @varsvat, please do the necessary changes as I requested, the remaining parts look good to me.

[varsvat]

@therajanmaurya Please review this PR when you get the time and then you can merge it.

[varsvat]

@jawidMuhammadi As discussed, Support for Task management features have been Implemented. Kindly review and let me know if any changes are to be done.