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/schema/common/map.js

@@ -0,0 +1,17 @@
+import { isMap } from '../../nodes/identity.js';
+import { YAMLMap } from '../../nodes/YAMLMap.js';
+
+const map = {
+    collection: 'map',
+    default: true,
+    nodeClass: YAMLMap,
+    tag: 'tag:yaml.org,2002:map',
+    resolve(map, onError) {
+        if (!isMap(map))
+            onError('Expected a mapping for this tag');
+        return map;
+    },
+    createNode: (schema, obj, ctx) => YAMLMap.from(schema, obj, ctx)
+};
+
+export { map };