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.

.vscode/ftp-kr.sync.cache.json

@@ -708,8 +708,8 @@
         },
         "Product.php": {
           "type": "-",
-          "size": 317879,
-          "lmtime": 1744577629429,
+          "size": 317882,
+          "lmtime": 1744927324329,
           "modified": false
         },
         "ProductPresenterFactory.php": {
@@ -1029,6 +1029,12 @@
         "lmtime": 0,
         "modified": true
       },
+      "image_log.json": {
+        "type": "-",
+        "size": 977,
+        "lmtime": 0,
+        "modified": false
+      },
       "images.inc.php": {
         "type": "-",
         "size": 4830,
@@ -1514,6 +1520,12 @@
         "lmtime": 0,
         "modified": false
       },
+      "import-product.php": {
+        "type": "-",
+        "size": 22539,
+        "lmtime": 1744926713383,
+        "modified": false
+      },
       "index.php": {
         "type": "-",
         "size": 1169,