Add export and load for dagger images

Signed-off-by: Helder Correia <174525+helderco@users.noreply.github.com>

plancontext/context.go

@@ -10,6 +10,7 @@ type Context struct {
 	Platform  *platformContext
 	FS        *fsContext
 	LocalDirs *localDirContext
+	TempDirs  *tempDirContext
 	Secrets   *secretContext
 	Services  *serviceContext
 }
@@ -25,6 +26,9 @@ func New() *Context {
 		LocalDirs: &localDirContext{
 			store: []string{},
 		},
+		TempDirs: &tempDirContext{
+			store: make(map[string]string),
+		},
 		Secrets: &secretContext{
 			store: make(map[string]*Secret),
 		},