chore/add eof rules for prettier and eslint

.prettierrc.cjs

@@ -4,4 +4,5 @@ module.exports = {
   singleQuote: true,
   printWidth: 80,
   tabWidth: 2,
+  endOfLine: 'lf',
 };

eslint.config.js

@@ -35,6 +35,7 @@ export default tseslint.config(
       ...reactHooks.configs.recommended.rules,
       ...prettierConfig.rules,
       'prettier/prettier': 'error',
+      'linebreak-style': ['error', 'unix'],
       'react-refresh/only-export-components': 'warn',
       '@typescript-eslint/no-explicit-any': 'warn',
     },