feat(mdx-loader): upgrade to MDX v3 + (#9451)

jest/vendor/mdast-util-to-string@4.0.0.js

@@ -0,0 +1,65 @@
+var __defProp = Object.defineProperty;
+var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
+var __getOwnPropNames = Object.getOwnPropertyNames;
+var __hasOwnProp = Object.prototype.hasOwnProperty;
+var __export = (target, all2) => {
+  for (var name in all2)
+    __defProp(target, name, { get: all2[name], enumerable: true });
+};
+var __copyProps = (to, from, except, desc) => {
+  if (from && typeof from === "object" || typeof from === "function") {
+    for (let key of __getOwnPropNames(from))
+      if (!__hasOwnProp.call(to, key) && key !== except)
+        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
+  }
+  return to;
+};
+var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
+
+// node_modules/mdast-util-to-string/index.js
+var mdast_util_to_string_exports = {};
+__export(mdast_util_to_string_exports, {
+  toString: () => toString
+});
+module.exports = __toCommonJS(mdast_util_to_string_exports);
+
+// node_modules/mdast-util-to-string/lib/index.js
+var emptyOptions = {};
+function toString(value, options) {
+  const settings = options || emptyOptions;
+  const includeImageAlt = typeof settings.includeImageAlt === "boolean" ? settings.includeImageAlt : true;
+  const includeHtml = typeof settings.includeHtml === "boolean" ? settings.includeHtml : true;
+  return one(value, includeImageAlt, includeHtml);
+}
+function one(value, includeImageAlt, includeHtml) {
+  if (node(value)) {
+    if ("value" in value) {
+      return value.type === "html" && !includeHtml ? "" : value.value;
+    }
+    if (includeImageAlt && "alt" in value && value.alt) {
+      return value.alt;
+    }
+    if ("children" in value) {
+      return all(value.children, includeImageAlt, includeHtml);
+    }
+  }
+  if (Array.isArray(value)) {
+    return all(value, includeImageAlt, includeHtml);
+  }
+  return "";
+}
+function all(values, includeImageAlt, includeHtml) {
+  const result = [];
+  let index = -1;
+  while (++index < values.length) {
+    result[index] = one(values[index], includeImageAlt, includeHtml);
+  }
+  return result.join("");
+}
+function node(value) {
+  return Boolean(value && typeof value === "object");
+}
+// Annotate the CommonJS export names for ESM import in node:
+0 && (module.exports = {
+  toString
+});