Add gitignore, update composer.json, and add agent file

composer.json

@@ -7,7 +7,7 @@
     "authors": [
         {
             "name": "Chris Smith",
-            "email": "chris@cgsmith.net"
+            "email": "cgsmith105@gmail.com"
         }
     ],
     "support": {
@@ -16,7 +16,7 @@
     },
     "require": {
         "php": ">=8.2",
-        "yiisoft/yii2": "^2.0.45"
+        "yiisoft/yii2": "~2.0.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^10.0",
@@ -35,7 +35,16 @@
     "extra": {
         "bootstrap": "cgsmith\\user\\Bootstrap"
     },
+    "repositories": [
+        {
+            "type": "composer",
+            "url": "https://asset-packagist.org"
+        }
+    ],
     "config": {
-        "sort-packages": true
+        "sort-packages": true,
+        "allow-plugins": {
+            "yiisoft/yii2-composer": true
+        }
     }
 }