feat(academic-calendar): replace graphql with REST

[mikolaj-jalocha]

• replace graphql's endpoint for buidlings with REST
• docs can be found here: https://github.com/Solvro/backend-topwr

[simon-the-shark]

So this task is not about changing anything visual-wise. We need to change the source of our data in exam session counter / academic calendar (whatever you call it).

Just see /lib/features/academic_calendar and you need to change /repository/ there to fetch data from our new REST API: https://api.topwr.solvro.pl/api/v1/ instead of current GraphQL API endpoint. The endpoint's documenatation is here: https://github.com/Solvro/backend-topwr

Briefly looking you need to use two endpoints https://api.topwr.solvro.pl/api/v1/academic_calendars and https://api.topwr.solvro.pl/api/v1/day_swaps but I might be wrong :P.

For reference you can see #673 Pull Request which basically did the same, but in the guide feature. Some elements prolly can be reused.

Please create a your branch from the dev branch.

In case of any question, please hit us up.