Add trip price in the search results

[francescosoave]

Acknowledgments
Please check the following boxes with an x if they apply:

• The feature I want to propose would be useful for the majority of users, not only for me personally.
• I am aware that Transportr is mostly developed by one person in their unpaid spare time.
• [maybe] I can help myself to get this feature implemented or know someone who wants to do it.
• If I want to add support for a new region or country, I checked that this is already available in public-transport-enabler and know the process described on the Transportr homepage.

Is your feature request related to a problem? Please describe.
no, but I think it's useful information (feature seen in other apps)

Describe the solution you'd like
In the search results, display the total cost of each proposed result

Describe alternatives you've considered
A clear and concise description of any alternative solutions you've considered. But please limit this ticket to one feature or use-case.

Additional context
Add any other context or screenshots about the feature request here.

[ialokim]

Thanks for your suggestion, but this is a duplicate of #231 and already in development with PR #627.