MCP Agent TypeScript Port

/** Get the real length of a string - by correctly counting astral symbols and ignoring [ansi escape codes](https://github.com/sindresorhus/strip-ansi). `String#length` erroneously counts [astral symbols](https://web.archive.org/web/20150721114550/http://www.tlg.uci.edu/~opoudjis/unicode/unicode_astral.html) as two characters. @example ``` import stringLength = require('string-length'); '🐴'.length; //=> 2 stringLength('🐴'); //=> 1 stringLength('\u001B[1municorn\u001B[22m'); //=> 7 ``` */ declare function stringLength(string: string): number; export = stringLength;