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/tests/php/phpstan.sh

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+#!/bin/bash
+PS_VERSION=$1
+
+set -e
+
+# Docker images prestashop/prestashop may be used, even if the shop remains uninstalled
+echo "Pull PrestaShop files (Tag ${PS_VERSION})"
+
+docker rm -f temp-ps || true
+docker volume rm -f ps-volume || true
+
+docker run -tid --rm -v ps-volume:/var/www/html --name temp-ps prestashop/prestashop:$PS_VERSION
+
+# Clear previous instance of the module in the PrestaShop volume
+echo "Clear previous module"
+
+docker exec -t --user root temp-ps sh -c 'if [ -d "/var/www/html/modules/ps_emailalerts" ]; then find /var/www/html/modules/ps_emailalerts -type f -exec rm {} +; fi'
+
+# Run a container for PHPStan, having access to the module content and PrestaShop sources.
+# This tool is outside the composer.json because of the compatibility with PHP 5.6
+echo "Run PHPStan using phpstan-${PS_VERSION}.neon file"
+
+docker run --rm --volumes-from temp-ps \
+       -v $PWD:/var/www/html/modules/ps_emailalerts \
+       -e _PS_ROOT_DIR_=/var/www/html \
+       --workdir=/var/www/html/modules/ps_emailalerts phpstan/phpstan:0.12 \
+       analyse \
+       --configuration=/var/www/html/modules/ps_emailalerts/tests/php/phpstan/phpstan-$PS_VERSION.neon

modules/ps_emailalerts/tests/php/phpstan/phpstan-1.7.6.neon

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+includes:
+	- %currentWorkingDirectory%/tests/php/phpstan/phpstan.neon
+
+parameters:
+  ignoreErrors:
+    - '~^Parameter #1 \$share of static method ShopCore::getContextListShopID\(\) expects string, false given\.$~'
+    - '~^Parameter #1 \$share of static method ShopCore::addSqlRestriction\(\) expects int, false given\.$~'
+    - '~^Parameter #4 \$templateVars of static method MailCore::send\(\) expects string, array<string, (mixed|int|string|\|)+> given\.$~'
+    - '~^Parameter #1 \$id of class Customer constructor expects null, int given\.$~'

modules/ps_emailalerts/tests/php/phpstan/phpstan-1.7.7.neon

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+includes:
+	- %currentWorkingDirectory%/tests/php/phpstan/phpstan.neon
+
+parameters:
+  ignoreErrors:
+    - '#Parameter \#1 \$share of static method ShopCore\:\:getContextListShopID\(\) expects string, false given.#'
+    - '#Parameter \#1 \$share of static method ShopCore\:\:addSqlRestriction\(\) expects int, false given.#'

modules/ps_emailalerts/tests/php/phpstan/phpstan-1.7.8.neon

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+includes:
+	- %currentWorkingDirectory%/tests/php/phpstan/phpstan.neon
+
+parameters:
+  ignoreErrors:
+    - '#Parameter \#1 \$share of static method ShopCore\:\:getContextListShopID\(\) expects string, false given.#'
+    - '#Parameter \#1 \$share of static method ShopCore\:\:addSqlRestriction\(\) expects int, false given.#'

modules/ps_emailalerts/tests/php/phpstan/phpstan-8.0.neon

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+includes:
+	- %currentWorkingDirectory%/tests/php/phpstan/phpstan.neon
+
+parameters:
+  ignoreErrors:
+    - '#Parameter \#1 \$share of static method ShopCore\:\:getContextListShopID\(\) expects string, false given.#'
+    - '#Parameter \#1 \$share of static method ShopCore\:\:addSqlRestriction\(\) expects int, false given.#'

modules/ps_emailalerts/tests/php/phpstan/phpstan-latest.neon

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+includes:
+	- %currentWorkingDirectory%/tests/php/phpstan/phpstan.neon
+
+parameters:
+  ignoreErrors:
+    - '#Parameter \#1 \$share of static method ShopCore\:\:getContextListShopID\(\) expects string, false given.#'
+    - '#Parameter \#1 \$share of static method ShopCore\:\:addSqlRestriction\(\) expects int, false given.#'

modules/ps_emailalerts/tests/php/phpstan/phpstan.neon

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+includes:
+	- %currentWorkingDirectory%/vendor/prestashop/php-dev-tools/phpstan/ps-module-extension.neon
+
+parameters:
+  paths:
+    # From PHPStan 0.12, paths to check are relative to the neon file
+    - ../../../ps_emailalerts.php
+    - ../../../upgrade
+    - ../../../MailAlert.php
+    - ../../../controllers
+  reportUnmatchedIgnoredErrors: false
+  level: 5
+  ignoreErrors:
+    - '#Unreachable statement \- code above always terminates\.#'