Tour booking functionality

- the ability to choose a 1-day or 2-day tour type
- the ability to choose a group/private tour type
- the ability to choose a tour type (sherpa/helicopter/basic....)
- the ability to choose a calendar date. The calendar highlights the selected tour type accordingly
- the ability to provide contact details
- navigation between steps. Step selection of tour/contact details
- the ability to specify the number of tourists
- saving the state of the calendar and options
- calculation of the total cost on the fly
- payment integration

Admin panel
- the ability to set active/inactive dates for each tour type
- saving applications with entered data in the admin panel