feat(wip): add csv import

add optional payee and posting description

fix: pretty error on malformed account

refactor: cleaner posting balancing

feat: check transaction balancing

feat: account type error msg and update levenshtein

chore: add readme

chore: add license

feat: make cli

feat: init lib with ledger and transaction type

feat: add basic account type

feat: add posting type

feat: add currency parsing

chore: init repo