many fixes and improvements - rework for modules/ and common/

feat(emailer): add Postmark and Resend providers

frontend/.eslintrc.json

@@ -1,4 +1,5 @@
 {
+  "parser": "vue-eslint-parser",
   "env": {
     "browser": true,
     "es2021": true
@@ -9,6 +10,7 @@
     "plugin:tailwindcss/recommended"
   ],
   "parserOptions": {
+    "parser": "@typescript-eslint/parser",
     "ecmaVersion": "latest",
     "sourceType": "module"
   },