feat: migrate api and core to ESM

.eslintrc

@@ -1,9 +1,6 @@
 {
-  "extends": ["@readme/eslint-config", "@readme/eslint-config/typescript"],
+  "extends": ["@readme/eslint-config", "@readme/eslint-config/esm", "@readme/eslint-config/typescript"],
   "root": true,
-  "rules": {
-    "unicorn/prefer-node-protocol": "error"
-  },
   "overrides": [
     {
       "files": ["bin/**"],

.gitignore

@@ -1,2 +1,3 @@
 dist/
 node_modules/
+**/*.tsbuildinfo

bin/build-markdown.js

@@ -1,5 +1,5 @@
-const fs = require('node:fs');
-const path = require('node:path');
+import fs from 'node:fs';
+import path from 'node:path';
 
 const readme = fs.readFileSync('README.md', 'utf-8');