Fix eslint issues - disable i18n-text rule for tests and fix import extension

Co-authored-by: dgreif <3026298+dgreif@users.noreply.github.com>

Author: Copilot

test/.eslintrc.json

@@ -1,12 +1,10 @@
 {
   "parser": "espree",
   "parserOptions": {
-    "ecmaVersion": 8
+    "ecmaVersion": 8,
+    "sourceType": "module"
   },
-  "env": {
-    "mocha": true
-  },
-  "globals": {
-    "assert": true
+  "rules": {
+    "i18n-text/no-en": "off"
   }
 }

test/test.js

@@ -1,5 +1,6 @@
+// eslint-disable-next-line import/named
 import {describe, it, beforeEach, afterEach, expect} from 'vitest'
-import {MarkdownQuote, Quote} from '../src/index.ts'
+import {MarkdownQuote, Quote} from '../src/index'
 
 function createSelection(selection, el) {
   const range = document.createRange()