Add initial files and templates for ps_emailalerts module

- Created LICENSE file for composer dependencies.
- Added autoload files: autoload_classmap.php, autoload_namespaces.php, autoload_psr4.php, autoload_real.php, and autoload_static.php.
- Initialized installed.json for composer.
- Added index.php and form templates for admin configuration.
- Implemented front-end templates for email alerts, including account management and product notifications.
- Included necessary headers and copyright notices in all new files.

modules/ps_emailalerts/composer.json

@@ -0,0 +1,25 @@
+{
+    "name": "prestashop/ps_emailalerts",
+    "description": "PrestaShop module ps_emailalerts",
+    "homepage": "https://github.com/PrestaShop/ps_emailalerts",
+    "license": "AFL-3.0",
+    "authors": [
+        {
+            "name": "PrestaShop SA",
+            "email": "contact@prestashop.com"
+        }
+    ],
+    "require": {
+        "php": ">=7.1.3"
+    },
+    "require-dev": {
+        "prestashop/php-dev-tools": "^5",
+        "friendsofphp/php-cs-fixer": "^v3"
+    },
+    "config": {
+        "preferred-install": "dist",
+        "prepend-autoloader": false
+    },
+    "type": "prestashop-module",
+    "author": "PrestaShop"
+}