strlen determines the length of a given string.
> length("hello") 5
When given a string, the result is the number of characters, rather than the number of bytes or Unicode sequences that form them:
> length("👾🕹️") 2
A "character" is a grapheme cluster, as defined by Unicode Standard Annex #29. Note that remote APIs may have a different definition of "character" for the purpose of length limits on string arguments; a Nomad provider is responsible for translating Nomad's string representation into that used by its respective remote system and applying any additional validation rules to it.