Summary

Adds a new concat function that:

• Flattens input values one level
• Filters out null/undefined values
• Preserves type information
• Works with mixed types and nested arrays

import { concat } from 'radashi'

const result = concat('a', null, ['b', undefined], 'c')
// => ['a', 'b', 'c']

Equivalent to doing this:

const result = ['a', null, ['b', undefined], 'c'].flat().filter(x => x != null)

Related issue, if any:

For any code change,

• Related documentation has been updated, if needed
• Related tests have been added or updated, if needed
• Related benchmarks have been added or updated, if needed
• Release notes in next-minor.md or next-major.md have been added, if needed

Does this PR introduce a breaking change?

No

Bundle impact