feat: add VS Code ChatGPT plugin config sync functionality

src/utils/providerConfigUtils.ts

@@ -288,3 +288,10 @@ export const hasTomlCommonConfigSnippet = (
   
   return existingSnippet === snippetString.trim();
 };
+
+// 从 Codex TOML 配置中提取 base_url
+export const extractBaseUrlFromToml = (tomlString: string): string => {
+  if (!tomlString) return "";
+  const match = tomlString.match(/base_url\s*=\s*"([^"]+)"/);
+  return match?.[1] ?? "";
+};