:sig
0_String

:see
>types
>string
split_utf8
substr
html_escape

:content
Primary string type used throughout UCE.

`String` is an alias for `std::string`.

It is used for request data, headers, cookie values, file contents, query strings, JSON text, and WebSocket payloads.

Because it is backed by `std::string`, it is binary-safe and may also contain raw bytes.

For UTF-8-aware splitting, use helpers such as `split_utf8()` instead of assuming one byte equals one character.

:example
String name = "Ada";
print(to_upper(name), "\n");
