feat: add support for Chalk color functions in prefix colors

[stephanschubert]

Summary

• Add support for all Chalk color functions: hex(), bgHex(), rgb(), bgRgb(), ansi256(), bgAnsi256()
• Add shorthand syntax #RRGGBB (foreground) and bg#RRGGBB (background)
• Support chaining functions and modifiers (e.g., rgb(255,136,0).bold, black.bgHex(#00FF00).dim)
• Fix CLI parsing to correctly handle commas inside function calls like rgb(255,255,0)

Examples

# Hex colors
$ concurrently -c 'bg#FF0000.bold,black.bgHex(#00FF00).dim' 'echo Red bg' 'echo Green bg'

# RGB colors
$ concurrently -c 'rgb(255,136,0).bold,black.bgRgb(100,100,255)' 'echo Orange' 'echo Blue bg'

# ANSI 256 colors
$ concurrently -c 'ansi256(199),ansi256(50).bgAnsi256(17)' 'echo Pink' 'echo Cyan on blue'

[coveralls]

coverage: 100.0%. remained the same
when pulling d74c6a0 on stephanschubert:feat/chalk-color-functions
into 2c30e74 on open-cli-tools:main.

[stephanschubert]

Updated coverage:

 % Coverage report from v8
---------------------------|---------|----------|---------|---------|-------------------
File                       | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
---------------------------|---------|----------|---------|---------|-------------------
All files                  |     100 |    99.83 |     100 |     100 |
 lib                       |     100 |    99.75 |     100 |     100 |
  assert.ts                |     100 |      100 |     100 |     100 |
  command.ts               |     100 |      100 |     100 |     100 |
  completion-listener.ts   |     100 |      100 |     100 |     100 |
  concurrently.ts          |     100 |      100 |     100 |     100 |
  date-format.ts           |     100 |    98.98 |     100 |     100 | 281
  defaults.ts              |     100 |      100 |     100 |     100 |
  jsonc.ts                 |     100 |      100 |     100 |     100 |
  logger.ts                |     100 |      100 |     100 |     100 |
  observables.ts           |     100 |      100 |     100 |     100 |
  output-writer.ts         |     100 |      100 |     100 |     100 |
  prefix-color-selector.ts |     100 |      100 |     100 |     100 |
  spawn.ts                 |     100 |      100 |     100 |     100 |
  utils.ts                 |     100 |      100 |     100 |     100 |
 lib/__fixtures__          |     100 |      100 |     100 |     100 |
  create-mock-instance.ts  |     100 |      100 |     100 |     100 |
  fake-command.ts          |     100 |      100 |     100 |     100 |
 lib/command-parser        |     100 |      100 |     100 |     100 |
  expand-arguments.ts      |     100 |      100 |     100 |     100 |
  expand-shortcut.ts       |     100 |      100 |     100 |     100 |
  expand-wildcard.ts       |     100 |      100 |     100 |     100 |
  strip-quotes.ts          |     100 |      100 |     100 |     100 |
 lib/flow-control          |     100 |      100 |     100 |     100 |
  input-handler.ts         |     100 |      100 |     100 |     100 |
  kill-on-signal.ts        |     100 |      100 |     100 |     100 |
  kill-others.ts           |     100 |      100 |     100 |     100 |
  log-error.ts             |     100 |      100 |     100 |     100 |
  log-exit.ts              |     100 |      100 |     100 |     100 |
  log-output.ts            |     100 |      100 |     100 |     100 |
  log-timings.ts           |     100 |      100 |     100 |     100 |
  logger-padding.ts        |     100 |      100 |     100 |     100 |
  output-error-handler.ts  |     100 |      100 |     100 |     100 |
  restart-process.ts       |     100 |      100 |     100 |     100 |
  teardown.ts              |     100 |      100 |     100 |     100 |
---------------------------|---------|----------|---------|---------|-------------------