Type:
([Text], Text) -> Text
Joins a list of text values together as one text item, inserting a separator between
each.
join text with(["a", "b", "c"], "+")→"a+b+c"
join text with(["Blanks", "", "Count"], ";")→"Blanks;;Count"
join text with(["Hello", " ", "Moon"], "-")→"Hello- -Moon"
join text with(["Hi"], ",")→"Hi"
join text with([], ",")→""