Add option to delete shifts in bulk

Add option to delete shifts in bulk

Issue:

Sometimes employers create shifts in bulks, and later on, something happens that makes the shifts useless. Now, they have to delete every shift individually.

Shifts should have the option to get deleted in bulks, for a better user experience. This is needed on the page "Shift Details"

To open the "Shift Details" page, go to the "Dashboard" page, click on "Open Shifts," then click on "View all."

Solution:

Add a button to delete shifts based on two chosen dates.

Solution Steps:

1. Add two input fields for the start and end of the date range. Then, add a button that deletes shifts based on that date range
2. Once finished, run all the tests provided in the repo to make sure that your integration was successful
3. Create a pull request so that your code can be evaluated by the Lead Developer before deployment.
4. Keep an eye out for any new bugs that arise after the change is deployed to the code.