Add extracted source directory and README navigation

extracted-source/node_modules/string-width/index.js

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+'use strict';
+const stripAnsi = require('strip-ansi');
+const isFullwidthCodePoint = require('is-fullwidth-code-point');
+const emojiRegex = require('emoji-regex');
+
+const stringWidth = string => {
+	if (typeof string !== 'string' || string.length === 0) {
+		return 0;
+	}
+
+	string = stripAnsi(string);
+
+	if (string.length === 0) {
+		return 0;
+	}
+
+	string = string.replace(emojiRegex(), '  ');
+
+	let width = 0;
+
+	for (let i = 0; i < string.length; i++) {
+		const code = string.codePointAt(i);
+
+		// Ignore control characters
+		if (code <= 0x1F || (code >= 0x7F && code <= 0x9F)) {
+			continue;
+		}
+
+		// Ignore combining characters
+		if (code >= 0x300 && code <= 0x36F) {
+			continue;
+		}
+
+		// Surrogates
+		if (code > 0xFFFF) {
+			i++;
+		}
+
+		width += isFullwidthCodePoint(code) ? 2 : 1;
+	}
+
+	return width;
+};
+
+module.exports = stringWidth;
+// TODO: remove this in the next major version
+module.exports.default = stringWidth;

extracted-source/node_modules/string-width/node_modules/is-fullwidth-code-point/index.js

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+/* eslint-disable yoda */
+'use strict';
+
+const isFullwidthCodePoint = codePoint => {
+	if (Number.isNaN(codePoint)) {
+		return false;
+	}
+
+	// Code points are derived from:
+	// http://www.unix.org/Public/UNIDATA/EastAsianWidth.txt
+	if (
+		codePoint >= 0x1100 && (
+			codePoint <= 0x115F || // Hangul Jamo
+			codePoint === 0x2329 || // LEFT-POINTING ANGLE BRACKET
+			codePoint === 0x232A || // RIGHT-POINTING ANGLE BRACKET
+			// CJK Radicals Supplement .. Enclosed CJK Letters and Months
+			(0x2E80 <= codePoint && codePoint <= 0x3247 && codePoint !== 0x303F) ||
+			// Enclosed CJK Letters and Months .. CJK Unified Ideographs Extension A
+			(0x3250 <= codePoint && codePoint <= 0x4DBF) ||
+			// CJK Unified Ideographs .. Yi Radicals
+			(0x4E00 <= codePoint && codePoint <= 0xA4C6) ||
+			// Hangul Jamo Extended-A
+			(0xA960 <= codePoint && codePoint <= 0xA97C) ||
+			// Hangul Syllables
+			(0xAC00 <= codePoint && codePoint <= 0xD7A3) ||
+			// CJK Compatibility Ideographs
+			(0xF900 <= codePoint && codePoint <= 0xFAFF) ||
+			// Vertical Forms
+			(0xFE10 <= codePoint && codePoint <= 0xFE19) ||
+			// CJK Compatibility Forms .. Small Form Variants
+			(0xFE30 <= codePoint && codePoint <= 0xFE6B) ||
+			// Halfwidth and Fullwidth Forms
+			(0xFF01 <= codePoint && codePoint <= 0xFF60) ||
+			(0xFFE0 <= codePoint && codePoint <= 0xFFE6) ||
+			// Kana Supplement
+			(0x1B000 <= codePoint && codePoint <= 0x1B001) ||
+			// Enclosed Ideographic Supplement
+			(0x1F200 <= codePoint && codePoint <= 0x1F251) ||
+			// CJK Unified Ideographs Extension B .. Tertiary Ideographic Plane
+			(0x20000 <= codePoint && codePoint <= 0x3FFFD)
+		)
+	) {
+		return true;
+	}
+
+	return false;
+};
+
+module.exports = isFullwidthCodePoint;
+module.exports.default = isFullwidthCodePoint;

extracted-source/node_modules/string-width/node_modules/strip-ansi/index.js

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+'use strict';
+const ansiRegex = require('ansi-regex');
+
+module.exports = string => typeof string === 'string' ? string.replace(ansiRegex(), '') : string;

extracted-source/node_modules/string-width/node_modules/strip-ansi/node_modules/ansi-regex/index.js

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+'use strict';
+
+module.exports = ({onlyFirst = false} = {}) => {
+	const pattern = [
+		'[\\u001B\\u009B][[\\]()#;?]*(?:(?:(?:(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]+)*|[a-zA-Z\\d]+(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]*)*)?\\u0007)',
+		'(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PR-TZcf-ntqry=><~]))'
+	].join('|');
+
+	return new RegExp(pattern, onlyFirst ? undefined : 'g');
+};