* Generalize trimming function to take a predicate block. Move this function to FoundationEssentials.
* Call `_trimmingWhitespaces()` instead of through CharacterSet.
* Review feedback: rename the function to whitespace from whitespaces
* Add tests
* Standarize whitespacing and remove spaces in empty line
* Zero in "0 byte" displays like latn "O" in Chinese simplified.
Only a small number of languages prefer spelling out number in this context according to localization team. Chinese wasn't one of those, hence this bug. Fix it by hard-coding a list of language codes where we should format number 0 as a spellout number.
Also were using a rule-based number formatter to format number 0 into spellout "Zero", which defaults to an ordinal number. That default rule was incorrect. The number should be formatted as a cardinal number instead.
* Review feedback: condense switch cases
