chore: improve user facing error massage when the stack is not found

Signed-off-by: Michal Wasilewski <[email protected]>

internal/cmd/stack/local_preview.go

@@ -61,7 +61,11 @@ func localPreview() cli.ActionFunc {
 		}
 
 		if err := authenticated.Client.Mutate(ctx, &uploadMutation, uploadVariables); err != nil {
-			return err
+			baseErrorMessage := "failed to upload local workspace"
+			if strings.Contains(err.Error(), "not found") {
+				return fmt.Errorf("%s: stack with ID %q could not be found. Please check that the stack exists and that you have access to it. To list available stacks run: spacectl stack list", baseErrorMessage, stackID)
+			}
+			return fmt.Errorf("%s: %w", baseErrorMessage, err)
 		}
 
 		fp := filepath.Join(os.TempDir(), "spacectl", "local-workspace", fmt.Sprintf("%s.tar.gz", uploadMutation.UploadLocalWorkspace.ID))