fix(ext/console): render properties of Intl.Locale (#24827)

Fixes #21271

---------

Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>

ext/console/01_console.js

@@ -790,6 +790,24 @@ function formatRaw(ctx, value, recurseTimes, typedArray, proxyDetails) {
             return ctx.stylize(base, "date");
           }
         }
+      } else if (
+        proxyDetails === null &&
+        ObjectPrototypeIsPrototypeOf(globalThis.Intl.Locale.prototype, value)
+      ) {
+        braces[0] = `${getPrefix(constructor, tag, "Intl.Locale")}{`;
+        ArrayPrototypeUnshift(
+          keys,
+          "baseName",
+          "calendar",
+          "caseFirst",
+          "collation",
+          "hourCycle",
+          "language",
+          "numberingSystem",
+          "numeric",
+          "region",
+          "script",
+        );
       } else if (
         proxyDetails === null &&
         typeof globalThis.Temporal !== "undefined" &&

tests/unit/console_test.ts

@@ -1066,6 +1066,24 @@ Deno.test(async function consoleTestStringifyPromises() {
   assertEquals(strLines[1], "  <rejected> Error: Whoops");
 });
 
+Deno.test(function consoleTestStringifyIntlLocale() {
+  assertEquals(
+    stringify(new Intl.Locale("zh-Hant-TW", { hourCycle: "h12" })),
+    `Locale [Intl.Locale] {
+  baseName: "zh-Hant-TW",
+  calendar: undefined,
+  caseFirst: undefined,
+  collation: undefined,
+  hourCycle: "h12",
+  language: "zh",
+  numberingSystem: undefined,
+  numeric: false,
+  region: "TW",
+  script: "Hant"
+}`,
+  );
+});
+
 Deno.test(function consoleTestWithCustomInspector() {
   class A {
     [customInspect](