Add composer.json with league/commonmark, guzzlehttp/guzzle, phpmailer/phpmailer; wire autoloader into bootstrap; document de-librairisation strategy and PHP extension setup

composer.json

@@ -0,0 +1,32 @@
+{
+    "name": "erg/xamxam",
+    "description": "Répertoire des TFE de l'ERG — École de Recherche Graphique",
+    "type": "project",
+    "license": "proprietary",
+    "require": {
+        "php": ">=8.4",
+        "ext-json": "*",
+        "ext-pdo": "*",
+        "ext-openssl": "*",
+        "league/commonmark": "^2.4",
+        "guzzlehttp/guzzle": "^7.9",
+        "phpmailer/phpmailer": "^6.9"
+    },
+    "require-dev": {
+        "friendsofphp/php-cs-fixer": "^3.95",
+        "phpstan/phpstan": "^2.1",
+        "symfony/polyfill-iconv": "^1.31"
+    },
+    "autoload": {
+        "classmap": [
+            "app/src/"
+        ]
+    },
+    "config": {
+        "optimize-autoloader": true,
+        "sort-packages": true,
+        "platform": {
+            "php": "8.4"
+        }
+    }
+}