Bug/193 scheduling doesnt use active hours closes #193

[TCHE614]

• Getting the saved value for the active hours from the settings page and pass it as a prop to the Calendar component.
• Extended the addTaskToSchedule() in TaskScheduler.js function to include a new parameter for the active hours. Making relevant changes to other files as necessary where the function is getting called
• Changed the EDF algorithm from the TaskScheduler.js file to make sure the tasks are scheduled between the active hours.

closes #193

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[jordansimsmith]

Nice work @DeshmukhChinmay @TCHE614. Your frontend tests seem to be failing, should just need to be updated to match your changes.

[DeshmukhChinmay]

@TCHE614 @jordansimsmith I have updated the tests to include the changes we made.