build: migrate .prettierrc.js to eslint.config.mjs

Author: mrholek

.prettierrc.js

@@ -0,0 +1,13 @@
+/**
+ * @see https://prettier.io/docs/en/configuration.html
+ * @type {import("prettier").Config}
+ */
+const config = {
+  printWidth: 100,
+  semi: false,
+  singleQuote: true,
+  tabWidth: 2,
+  trailingComma: 'es5',
+};
+
+export default config;