style: update import paths and ESLint configuration

eslint.config.mjs

@@ -1,4 +1,5 @@
 import { FlatCompat } from '@eslint/eslintrc';
+import noRelativeImportPaths from 'eslint-plugin-no-relative-import-paths';
 import { dirname } from 'path';
 import { fileURLToPath } from 'url';
 
@@ -14,6 +15,19 @@ const eslintConfig = [
   {
     ignores: ['src/generated/**', '.next/**', 'public/**'],
   },
+  {
+    plugins: {
+      'no-relative-import-paths': noRelativeImportPaths,
+    },
+    rules: {
+      'no-relative-import-paths/no-relative-import-paths': [
+        'error',
+        {
+          allowSameFolder: true,
+        },
+      ],
+    },
+  },
 ];
 
 export default eslintConfig;