* feat(editor): Show input number for multi-input nodes
* ✨ Added multiple inputs detection logic to input panel
* 🐛 Fix a case where Input 1 and Input 2 are identical, do not display nodeIndex for single input nodes
* 🔥 Delete unused `MERGE_NODE_TYPE` constant
* ♻️ Get input names dynamically for multi-input nodes
Co-authored-by: Milorad Filipovic <milorad@n8n.io>