add free-d encode and decode

internal/processing/free-d-decode.go

@@ -0,0 +1,40 @@
+package processing
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+
+	freeD "github.com/jwetzell/free-d-go"
+)
+
+type FreeDDecode struct {
+	config ProcessorConfig
+}
+
+func (fdd *FreeDDecode) Process(ctx context.Context, payload any) (any, error) {
+	payloadBytes, ok := payload.([]byte)
+
+	if !ok {
+		return nil, fmt.Errorf("freed.decode processor only accepts a []byte")
+	}
+
+	payloadMessage, err := freeD.Decode(payloadBytes)
+	if err != nil {
+		slog.Error("error decoding", "err", err)
+	}
+	return payloadMessage, nil
+}
+
+func (fdd *FreeDDecode) Type() string {
+	return fdd.config.Type
+}
+
+func init() {
+	RegisterProcessor(ProcessorRegistration{
+		Type: "freed.decode",
+		New: func(config ProcessorConfig) (Processor, error) {
+			return &FreeDDecode{config: config}, nil
+		},
+	})
+}