feat: add eslint-plugin-import-x

This enables the "recommended" ruleset for eslint-plugin-import-x, and
validates that imports are in a consistent order (and alphabetized).

Author: omghax

configs/envylabs-js.js

@@ -1,11 +1,28 @@
 import js from "@eslint/js";
+import { importX } from "eslint-plugin-import-x";
 import eslintPluginPrettierRecommended from "eslint-plugin-prettier/recommended";
 
 export default [
   js.configs.recommended,
+  importX.flatConfigs.recommended,
   eslintPluginPrettierRecommended,
   {
     rules: {
+      "import-x/order": [
+        "warn",
+        {
+          alphabetize: { order: "asc" },
+          groups: [
+            "builtin",
+            "external",
+            "internal",
+            "parent",
+            "sibling",
+            "index",
+          ],
+          "newlines-between": "always",
+        },
+      ],
       "prettier/prettier": "warn",
     },
   },

configs/envylabs-ts.js

@@ -1,9 +1,12 @@
-import tseslint from "typescript-eslint";
+import { importX } from "eslint-plugin-import-x";
+import { configs as tseslintConfigs } from "typescript-eslint";
+
 import eslintPluginEnvylabs from "./envylabs-js.js";
 
 export default [
   ...eslintPluginEnvylabs,
-  ...tseslint.configs.recommended,
+  ...tseslintConfigs.recommended,
+  importX.flatConfigs.typescript,
   {
     files: ["**/*.ts", "**/*.tsx"],
     languageOptions: {
@@ -15,6 +18,9 @@ export default [
       },
       sourceType: "module",
     },
+    rules: {
+      "@typescript-eslint/no-require-imports": "error",
+    },
   },
   {
     files: ["**/*.ts"],