Wrap parser error with account and filename

Fix date spacing hack

Add initial readme

Update cmd/status

Rename util.TxString to FormatTx, refactor, move Fields to util

Move pfin.TxString to util, add formatting functions

Add parser/all metapackage, add category to other parsers

cmd/unpaid: Refactor, add category totals

cmd/unpaid: Sort transactions by date, calculate paid and total, skip account and user

cmd/unpaid: Make separator configurable

Add category to transaction interface and some parsers

Add unpaid command

Combine root and account paths in ParseDir

Fix negated filters

Move ParseDir to pfin/util, rework cmd/main filters

pfin/util: Add StringFilter

Add filename to Parse interface, use it for personal accounts

cmd/main: Add some basic filters

Support setting default user per account

Expose account name in transaction interface