chore: install cssbundling rails and set up compilation

spec/dummy/node_modules/yaml/browser/dist/nodes/Pair.js

@@ -0,0 +1,36 @@
+import { createNode } from '../doc/createNode.js';
+import { stringifyPair } from '../stringify/stringifyPair.js';
+import { addPairToJSMap } from './addPairToJSMap.js';
+import { NODE_TYPE, PAIR, isNode } from './identity.js';
+
+function createPair(key, value, ctx) {
+    const k = createNode(key, undefined, ctx);
+    const v = createNode(value, undefined, ctx);
+    return new Pair(k, v);
+}
+class Pair {
+    constructor(key, value = null) {
+        Object.defineProperty(this, NODE_TYPE, { value: PAIR });
+        this.key = key;
+        this.value = value;
+    }
+    clone(schema) {
+        let { key, value } = this;
+        if (isNode(key))
+            key = key.clone(schema);
+        if (isNode(value))
+            value = value.clone(schema);
+        return new Pair(key, value);
+    }
+    toJSON(_, ctx) {
+        const pair = ctx?.mapAsMap ? new Map() : {};
+        return addPairToJSMap(ctx, pair, this);
+    }
+    toString(ctx, onComment, onChompKeep) {
+        return ctx?.doc
+            ? stringifyPair(this, ctx, onComment, onChompKeep)
+            : JSON.stringify(this);
+    }
+}
+
+export { Pair, createPair };