feat: add merged array from arrays of paths generator

[richrdkng]

If path is called with an arrays of paths, return them as a merged array of processed paths.

Called with a Single Array

const path = require('@nodewell/path')

// called with a single array
const p = path(['@/', 'README.md'])

console.log(p) // ===>
/*
[
  'absolute/path/to/project/README.md'
]
*/

Called with Multiple Arrays

const path = require('@nodewell/path')

// called with a single array
const p = path(
  ['@/README.md'],
  ['@', '/src/**/*.*'],
)

console.log(p) // ===>
/*
[
  'absolute/path/to/project/README.md',
  'absolute/path/to/project/src/**/*.*'
]
*/

Called with Multiple Arrays Containing Path Suffix Arrays Including Glob Excludes

const path = require('@nodewell/path')

// called with a single array
const p = path([
'@src', [
  '/*.js',
  '/internals/*.js'
  ]
], [
'@/', [
  'README.md',
  'LICENSE.md',
  'package.json'
  ]
], [
'!@/package-lock.json'
], [
'@/', [
  '!.gitattributes',
  '!.gitignore'
  ]
])

console.log(p) // ===>
/*
[
  'absolute/path/to/project/src/*.js',
  'absolute/path/to/project/src/internals/*.js',
  'absolute/path/to/project/README.md',
  'absolute/path/to/project/LICENSE.md',
  'absolute/path/to/project/package.json,
  '!absolute/path/to/project/package-lock.json,
  '!absolute/path/to/project/.gitattributes,
  '!absolute/path/to/project/.gitigmore,
]
*/