Update balance table to show Liquid, Savings, and Stake rows

Reorganize balance table layout to match Dashboard reorganization (MR !792):
- Change from 4 columns with headers to 3 columns without headers
- Remove column headers (show_header=False) for cleaner display
- Add new 'Stake' row displaying HP and VESTS balances
- Simplify column definitions by removing empty string labels
- All amounts now display with currency symbols via humanize functions

This layout change separates liquid, savings, and stake balances
into distinct rows, making the CLI output consistent with the Dashboard UI.

Related to #514