feat: support fixed column widths

[mdonnalley]

• Add width property to column configuration to support fixed width columns
• Add width property to table configuration to support fixed width tables

@W-17486159@

[cristiand391]

QA notes:

setup:
tested with Alacritty and Ghoshtty's inspector 😎
https://ghostty.org/

fixed width for for tables

✅ no width set, takes all space available
✅ percentages correctly calculated, can see the expected width in the inspector
✅ fixed cell respected
✅ percentages/qty of cells bigger than space available, table takes all available width
✅ negative values don't cause crash, table cells wrapped

fixed width for columns

✅ >1 padding doesn't affect fixed column width
✅ column char separator doesn't count as part an additional column width (so a table with 2 columns with 10cell fixed each renders a 21cell table)

EDIT: fixed
🟡 fixed width cell or percentages , additional cells in printed table

If I modify the fixed-width-columns example to set fixed column widths like this (or even the default with percentages):

  columns: [
    {key: 'test', width: 10},
    {key: 'result', width: 10},
    {key: 'expected', width: 10},
    {key: 'actual', width: 30},
  ],

The first 3 columns have a 13cell width and the last 33 cells: