fetching data from other file now working but lost loading screen, has to be investigated, error lies in loading variables

it stores the api token in localstorage.
the backend is responsible for providing the porper env variables.
also formated everything with prettier.

external functions work in principle but merge seems to have a problem when all three main fetches are called from the external file (when only two, it works) merge and filter has to be changed

implement bill, credit and reimbursement form on one page, connection to backend works, kst and ledgers are added as dropdown

create item create frontend, no validity check for user so far but writes into...

See merge request !1

create item create frontend, no validity check for user so far but writes into backend only if valid

site works, input possible, valid input not possible, will create new branch to try with easier post: create Item