`str length` for strings

Output the length of any strings in the pipeline.

Signature

> str length {flags} ...rest

--grapheme-clusters, -g: Count length in grapheme clusters (all visible chars have length 1).
--utf-8-bytes, -b: Count length in UTF-8 bytes (default; all non-ASCII chars have length 2+).
--chars, -c: Count length in chars.

...rest: For a data structure input, replace strings at the given cell paths with their length.

Return the lengths of a string in bytes.

> 'hello' | str length
5

Count length of a string in grapheme clusters.

> '🇯🇵ほげ ふが ぴよ' | str length  --grapheme-clusters
9

Return the lengths of multiple strings in bytes.

> ['hi' 'there'] | str length
╭───┬───╮
│ 0 │ 2 │
│ 1 │ 5 │
╰───┴───╯

Return the lengths of a string in chars.

> 'hällo' | str length --chars
5