use yaml instead of json for object detector docs

docs/plugins/yaml-loader.js

@@ -0,0 +1,23 @@
+const path = require("node:path");
+
+// Enables importing YAML data files from docs/data as plain JS objects.
+// Scoped to the data directory so it never intercepts other .yaml files
+// (e.g. the OpenAPI spec under static/).
+module.exports = function (context, options) {
+  return {
+    name: "yaml-data-loader",
+    configureWebpack(config, isServer, utils) {
+      return {
+        module: {
+          rules: [
+            {
+              test: /\.ya?ml$/,
+              include: path.resolve(__dirname, "..", "data"),
+              use: path.resolve(__dirname, "js-yaml-loader.js"),
+            },
+          ],
+        },
+      };
+    },
+  };
+};