perf(backend): concurrently load messages for combined lists using child processes (#1452)

* enh(backend): concurrently load messages for combined lists using child processes

* fix(frontend): pagination

Author: mercihabam

composer.json

@@ -57,7 +57,10 @@
         "twbs/bootstrap": "^5.3",
         "twbs/bootstrap-icons": "^1.11",
         "webklex/composer-info": "^0.0.1",
-        "zbateson/mail-mime-parser": "^2.4"
+        "zbateson/mail-mime-parser": "^2.4",
+        "react/promise": "^3.2.0",
+        "react/async": "^4.3.0",
+        "react/child-process": "^0.6.6"
     },
     "require-dev": {
         "phpunit/phpunit": "^10.5"