api Str provides Str, isEmpty, join

## Types

Str := Str

## Convert

## Convert a @Float to a decimal string, rounding off to the given number of decimal places.
##
## Since @Float values are imprecise, it's usually best to limit this to the lowest
## number you can choose that will make sense for what you want to display.
##
## If you want to kep all the digits, passing @Int.highestSupported will accomplish this,
## but it's recommended to pass much smaller numbers instead.
##
## Passing a negative number for decimal places is equivalent to passing 0.
decimal : Int, Float -> Str

## Convert an @Int to a string.
int : Float -> Str

## Check

isEmpty : Str -> Bool

startsWith : Str, Str -> Bool

endsWith : Str, Str -> Bool

contains : Str, Str -> Bool

any : Str, Str -> Bool

all : Str, Str -> Bool

## Combine

join : List Str -> Str

joinWith : Str, List Str -> Str

padStart : Int, Str, Str -> Str

padEnd : Int, Str, Str -> Str