Core Packags: Convert to ESM

[azu]

Current, secretlint packages are CommonJS.
We want to convert theset to Pure ECMAScript Modules.

• Pure ESM package

It will help to improve compatibility for Web/Deno etc..

Another Option

• Make Dual Package
  • azu/tsconfig-to-dual-package: Node.js dual package tool that add package.json to tsconfig's outDir

However, Dual package is difficult to maintain.
I prefer to convert Pure ESM.

Tools

• eslint-cjs-to-esm
• azu/commonjs-to-es-module-codemod: Codemod that convert CommonJS(require/exports) to ES Modules(import/export) for JavaScript/TypeScript