adding error & deploy notification

haven-notify/template/error.tmpl

@@ -0,0 +1,37 @@
+{{/*
+Error Notification Template
+Variables expected:
+- .caller: The caller of the error
+- .message: The error message
+- .critical: Boolean indicating if the error is critical
+- .extra: Optional array of additional fields with .name and .value
+*/}}
+{
+  "embeds": [
+    {
+      "title": "❌ Error",
+      "description": "**{{.caller}}** encountered an error!",
+      "color": {{if .critical}}15158332{{else}}15844367{{end}},
+      "fields": [
+        {
+          "name": "📄 Message",
+          "value": "{{.message}}",
+          "inline": false
+        }
+        {{- if .extra}}
+        {{- range $index, $field := .extra}},
+        {
+          "name": "{{$field.name}}",
+          "value": "{{$field.value}}",
+          "inline": true
+        }
+        {{- end}}
+        {{- end}}
+      ],
+      "footer": {
+        "text": "✨ Haven Notify ✨"
+      },
+      "timestamp": "{{formatTime .timestamp}}"
+    }
+  ]
+}