REFACTOR: change the formatting functionality of locales to a reusable function

[NabbeunNabi]

Problem

Right now the when we display the locale on the home page of the doctors it is very readable. I can think of many use cases where we would want this functionality. So it should be moved out into the localeStore

Success

This function is moved, refactored, and tested

Requirements

• [x] Move the function and implement the reusability in the store
• [x] Write tests that test the expected functionality