Add transform resolver wiring

internal/publish/plan.go

@@ -9,7 +9,6 @@ import (
 	"gitea.maximumdirect.net/eric/distributor/internal/state"
 	"gitea.maximumdirect.net/eric/distributor/internal/storage"
 	"gitea.maximumdirect.net/eric/distributor/internal/transform"
-	markdowntransform "gitea.maximumdirect.net/eric/distributor/internal/transform/markdown"
 )
 
 type Action string
@@ -32,10 +31,15 @@ type Request struct {
 	DestinationBundlePath string
 	Publish               config.PublishPolicy
 	Transform             config.Transform
+	Transformers          TransformerResolver
 	Transfer              config.TransferPolicy
 	DistributorVersion    string
 }
 
+type TransformerResolver interface {
+	Get(name string) (transform.Transformer, bool)
+}
+
 type Plan struct {
 	PipelineID            string
 	DestinationID         string
@@ -108,10 +112,6 @@ func validateRequest(req Request) error {
 	return nil
 }
 
-func markdownTransformer() transform.Transformer {
-	return markdowntransform.New()
-}
-
 func actionForComparison(comparison state.Comparison, transfer config.TransferPolicy) (Action, string) {
 	switch comparison.Outcome {
 	case state.OutcomeDestinationAbsent: