message: fix: prepend new node in Auspice tree
diff: @@ -76,7 +76,9 @@ fn add_child(node: &mut AuspiceTreeNode, result: &NextcladeOutputs) {
  )
  };
  - node.children.push(AuspiceTreeNode {
  + node.children.insert(
  + 0,
  + AuspiceTreeNode {
  name: format!("{}_new", result.seq_name),
  branch_attrs: TreeBranchAttrs {
  mutations,
  @@ -104,7 +106,8 @@ fn add_child(node: &mut AuspiceTreeNode, result: &NextcladeOutputs) {
  children: vec![],
  tmp: TreeNodeTempData::default(),
  other: serde_json::Value::default(),
  - });
  + },
  + );
  }
  fn convert_mutations_to_node_branch_attrs(nuc_muts: &PrivateNucMutations) -> BTreeMap<String, Vec<String>> {
  