FOR REVIEW:
- [x] open ledger with starting balances
- [x] single entry and multiple entry
- [x] --rich or --json
- [x] add command
- [x] show operations in chart
- [x] add account types to trial balance
- [x] merge test suites 
- [x] mount as bx
- [x] README migration 


FIXME:
- bx ledger init must fail when file is present
- --title fails when written first

TODO:
- [ ] memo + build-you-own-x
- [ ] RAS codes 
- [ ] requires in alias 
- [ ] textbook examples

WONTFIX:
- [ ] --title for csv file
- [ ] help messages
- [ ] types of entries (S,B,A,C1,C2,C3,C4,P)
- [ ] post entry with chart check
- [ ] adjustment and post-close entries
- [ ] cash in chart
- [ ] change readme
- [ ] consolidate at /example folder
- [ ] `--reference` or `--refer`
- [ ] adjustment example (with trial balance)
- [ ] post-close example
- [ ] add operation title to entry title
- [ ] add small hash for entry
- [ ] `--cash` asset type
- [ ] `--current-asset`, `--non-current-asset` asset type
- [ ] `--current-liability`, `--long-term-liability`

Wont fix:
- [ ] `ledger list` must show nicer output
- [ ] --title for entry
- [ ] testing of a multiline string `pytest-console-plugin`
- [ ] write to and read from Excel file
