Inform user about overlapping rides

[MistyRavager]

Currently its possible to end up with multiple overlapping rides, because people might create rides without checking the existing ones first.

To solve this, when someone is adding a ride, check if there are rides with overlapping times and place. Some ways to inform the user:

• as soon as the three fields get filled, add text to the bottom of form or send notification to user with a message on the lines of "There are x rides with similar stuff, you might wanna check them out in All rides" if overlapping rides are there
• when the user clicks on book open a "confirm modal" and ask if they still want to create the ride or redirect them to the filtered bookings with the filters filled in.

Endpoint to hit: "/bookings" with query parameters from_loc, to_loc, start_time, end_time.