Add Clean generated files task (#4607)

* Add clean generate task
* Add to library tasks
* Save and read defaults
* Stop handling and logging
* Make filename parsing more robust

pkg/models/repository_blob.go

@@ -0,0 +1,8 @@
+package models
+
+import "context"
+
+// FileGetter provides methods to get files by ID.
+type BlobReader interface {
+	EntryExists(ctx context.Context, checksum string) (bool, error)
+}