Add email address generator: 3 styles, 14 domains, inline menu, /email command, tests

tests/email.mjs

@@ -0,0 +1,17 @@
+import { generateEmail, EMAIL_DOMAINS } from '../lib/generator.js';
+import assert from 'node:assert/strict';
+
+
+for (const style of ['random', 'pronounceable', 'wordnum']) {
+  for (const domain of EMAIL_DOMAINS) {
+    for (let i = 0; i < 200; i++) {
+      const e = generateEmail({ style, domain, withNumber: i % 2 === 0 });
+      assert.match(e, /^[a-z0-9][a-z0-9.]*@[a-z.]+$/, 'format for ' + style + '/' + domain + ' -> ' + e);
+      assert.ok(e.endsWith('@' + domain), 'domain kept: ' + e);
+      const local = e.split('@')[0];
+      assert.ok(local.length >= 5, 'local length ok: ' + e);
+      if (i % 2 === 0) assert.match(local, /\d/, 'has number: ' + e);
+    }
+  }
+}
+console.log('EMAIL SMOKE OK — ' + EMAIL_DOMAINS.length * 3 * 200 + ' адресов валидны');