Add extracted source directory and README navigation

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

@@ -0,0 +1,38 @@
+export default function indentString(string, count = 1, options = {}) {
+	const {
+		indent = ' ',
+		includeEmptyLines = false
+	} = options;
+
+	if (typeof string !== 'string') {
+		throw new TypeError(
+			`Expected \`input\` to be a \`string\`, got \`${typeof string}\``
+		);
+	}
+
+	if (typeof count !== 'number') {
+		throw new TypeError(
+			`Expected \`count\` to be a \`number\`, got \`${typeof count}\``
+		);
+	}
+
+	if (count < 0) {
+		throw new RangeError(
+			`Expected \`count\` to be at least 0, got \`${count}\``
+		);
+	}
+
+	if (typeof indent !== 'string') {
+		throw new TypeError(
+			`Expected \`options.indent\` to be a \`string\`, got \`${typeof indent}\``
+		);
+	}
+
+	if (count === 0) {
+		return string;
+	}
+
+	const regex = includeEmptyLines ? /^/gm : /^(?!\s*$)/gm;
+
+	return string.replace(regex, indent.repeat(count));
+}