Text, formats and data

Text, character data, encodings and file formats.

unicode: Character properties, case mapping, full case folding and NFC/NFD normalization from the Unicode Character Database.
format: Options for one number in a text, as small typed values that are themselves writable.
regex: Regular expressions compiled to a byte-level automaton.
textdiff: The differences between two texts, line by line, and the unified diff.

textedit: An editing core for text and code (a piece table), its undo commands and a code editor widget.
richtext: Documents with paragraphs, styles, lists and images, and their editor.

json: JSON (RFC 8259) read and written: a value tree, a streaming reader, and accessors.
toml: A reader for a subset of TOML, enough for Congo's manifests.
binarytext: Bytes as text: Base64 and hex, one-shot and streaming.
textcodec: UTF-16 (both byte orders, byte-order marks), Latin-1 and Windows-1252 to and from UTF-8, in Cone.
uuid: UUIDs (RFC 9562): random v4, time-ordered v7, parse and print.
cryptohash: SHA-256, SHA-512, SHA-1, SHA-3 and MD5 (not for security), HMAC, constant-time comparison, PBKDF2 and HKDF.
imagedecode: PNG and JPEG decoders and a PNG writer, with no C library.
csv: CSV (RFC 4180) read and written as text, in Cone, with no C library.