Add archify-vscode-ext skill: Archify diagrams and models for the Archify Diagram Viewer extension

Model tasks (validate, list, scaffold, resolve), diagram tasks (validate,
render), the bundled Archify 3.0.1 runtime and yaml parser under
scripts/vendor, references for authoring, formats and folders, and the
online-shop example model.

scripts/vendor/yaml/compose/util-map-includes.js

@@ -0,0 +1,13 @@
+import { isScalar } from '../nodes/identity.js';
+
+function mapIncludes(ctx, items, search) {
+    const { uniqueKeys } = ctx.options;
+    if (uniqueKeys === false)
+        return false;
+    const isEqual = typeof uniqueKeys === 'function'
+        ? uniqueKeys
+        : (a, b) => a === b || (isScalar(a) && isScalar(b) && a.value === b.value);
+    return items.some(pair => isEqual(pair.key, search));
+}
+
+export { mapIncludes };