Add extracted source directory and README navigation

extracted-source/node_modules/es-errors/eval.js

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+'use strict';
+
+/** @type {import('./eval')} */
+module.exports = EvalError;

extracted-source/node_modules/es-errors/index.js

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+'use strict';
+
+/** @type {import('.')} */
+module.exports = Error;

extracted-source/node_modules/es-errors/range.js

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+'use strict';
+
+/** @type {import('./range')} */
+module.exports = RangeError;

extracted-source/node_modules/es-errors/ref.js

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+'use strict';
+
+/** @type {import('./ref')} */
+module.exports = ReferenceError;

extracted-source/node_modules/es-errors/syntax.js

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+'use strict';
+
+/** @type {import('./syntax')} */
+module.exports = SyntaxError;

extracted-source/node_modules/es-errors/type.js

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+'use strict';
+
+/** @type {import('./type')} */
+module.exports = TypeError;

extracted-source/node_modules/es-errors/uri.js

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+'use strict';
+
+/** @type {import('./uri')} */
+module.exports = URIError;