feat: add type declarations

Author: haoqunjiang

.changeset/slow-rats-try.md

@@ -0,0 +1,5 @@
+---
+"@vue/eslint-config-standard-with-typescript": minor
+---
+
+Added type declaration files

packages/eslint-config-standard-with-typescript/base.d.ts

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+declare const _default: import("eslint").Linter.Config[];
+export default _default;

packages/eslint-config-standard-with-typescript/index.d.ts

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+export { default as standardTypeChecked } from "./type-checked.js";
+export { default, default as standard } from "./base.js";

packages/eslint-config-standard-with-typescript/type-checked.d.ts

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+declare const _default: import("eslint").Linter.Config[];
+export default _default;