[Enhancement] Localize all Layout Text into one single file(en.json)

[sumitra19jha]

Issue Description:

App bar text, button text, and all widget text are currently implemented in the code itself. This makes managing the content of the screen within the project difficult as the code base is increasing enormously.

Issue Severity:

Medium

Observed Behaviour:

Implementation of strings in the widget itself.

Expected Behaviour:

All the layout strings should be managed from one place.

Steps to reproduce issue:

1. Go to screen pages or individual widgets
2. Check the declaration of all the layout strings there

Does this issue need immediate attention?

No

Are you willing to work on this issue:

Yes

Other information:

This will help to:

1. Manage layout string efficiently.
2. In future will help to release the app easily in other languages as well.