1 v0

1.1 Charset detection utility [✓ Complete]

Plan

Implement betto_charset_detector as a standalone, pure-Dart package that detects the character encoding of an arbitrary byte sequence. The detector uses a three-stage pipeline — BOM inspection, UTF-8 structural validation, and candidate probing via the charset package — and supports all Dart and Flutter target platforms (mobile, web, desktop) with no native dependencies.