feat: implement thin vertical slice of system-generated notifications (#13537)

coderd/notifications/types/cta.go

@@ -0,0 +1,6 @@
+package types
+
+type TemplateAction struct {
+	Label string `json:"label"`
+	URL   string `json:"url"`
+}

coderd/notifications/types/payload.go

@@ -0,0 +1,19 @@
+package types
+
+// MessagePayload describes the JSON payload to be stored alongside the notification message, which specifies all of its
+// metadata, labels, and routing information.
+//
+// Any BC-incompatible changes must bump the version, and special handling must be put in place to unmarshal multiple versions.
+type MessagePayload struct {
+	Version string `json:"_version"`
+
+	NotificationName string `json:"notification_name"`
+	CreatedBy        string `json:"created_by"`
+
+	UserID    string `json:"user_id"`
+	UserEmail string `json:"user_email"`
+	UserName  string `json:"user_name"`
+
+	Actions []TemplateAction  `json:"actions"`
+	Labels  map[string]string `json:"labels"`
+}