Add extracted source directory and README navigation

extracted-source/node_modules/yaml/dist/nodes/Scalar.js

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+'use strict';
+
+var identity = require('./identity.js');
+var Node = require('./Node.js');
+var toJS = require('./toJS.js');
+
+const isScalarValue = (value) => !value || (typeof value !== 'function' && typeof value !== 'object');
+class Scalar extends Node.NodeBase {
+    constructor(value) {
+        super(identity.SCALAR);
+        this.value = value;
+    }
+    toJSON(arg, ctx) {
+        return ctx?.keep ? this.value : toJS.toJS(this.value, arg, ctx);
+    }
+    toString() {
+        return String(this.value);
+    }
+}
+Scalar.BLOCK_FOLDED = 'BLOCK_FOLDED';
+Scalar.BLOCK_LITERAL = 'BLOCK_LITERAL';
+Scalar.PLAIN = 'PLAIN';
+Scalar.QUOTE_DOUBLE = 'QUOTE_DOUBLE';
+Scalar.QUOTE_SINGLE = 'QUOTE_SINGLE';
+
+exports.Scalar = Scalar;
+exports.isScalarValue = isScalarValue;