feat: normalize schemastore URLs to use www.schemastore.org` (#424)

* feat: normalize schemastore URLs to use `www.schemastore.org`

* Create two-years-jam.md

Author: ota-meshi

.changeset/two-years-jam.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-json-schema-validator": minor
+---
+
+feat: normalize schemastore URLs to use `www.schemastore.org`

src/utils/schema.ts

@@ -42,7 +42,7 @@ function loadJsonInternal<T>(
   edit?: (json: unknown) => T,
 ): null | T {
   if (jsonPath.startsWith("http://") || jsonPath.startsWith("https://")) {
-    return loadJsonFromURL(jsonPath, context, edit);
+    return loadJsonFromURL(normalizeSchemaUrl(jsonPath), context, edit);
   }
   if (jsonPath.startsWith("vscode://")) {
     let url = `https://raw.githubusercontent.com/ota-meshi/extract-vscode-schemas/main/resources/vscode/${jsonPath.slice(
@@ -78,6 +78,21 @@ function loadJsonInternal<T>(
   return edit ? edit(data) : data;
 }
 
+/**
+ * Normalize schema URL to use the official schemastore domain.
+ */
+function normalizeSchemaUrl(url: string): string {
+  for (const prefix of [
+    "https://json.schemastore.org/",
+    "http://json.schemastore.org/",
+  ]) {
+    if (url.startsWith(prefix)) {
+      return `https://www.schemastore.org/${url.slice(prefix.length)}`;
+    }
+  }
+  return url;
+}
+
 /** remove empty `enum:` schema */
 function removeEmptyEnum(
   // eslint-disable-next-line @typescript-eslint/no-explicit-any -- ignore