F: add incoming property pkg

cloudflare/incoming/property.go

@@ -0,0 +1,18 @@
+package incoming
+
+import (
+	"context"
+
+	"github.com/syumai/workers/internal/cfcontext"
+)
+
+type Properties struct {
+	AsOrganization string
+}
+
+func NewProperties(ctx context.Context) *Properties {
+	obj := cfcontext.MustExtractIncomingProperty(ctx)
+	return &Properties{
+		AsOrganization: obj.Get("asOrganization").String(),
+	}
+}