How do you add files to steps?

### Issue

I want to add files to steps, but nothing shows up there. How can I upload files for steps?

### Tandoor Version

2.3.6

### OS Version

Ubuntu 24.04.3 LTS

### Setup

Docker / Docker-Compose

### Reverse Proxy

Caddy

### Other

_No response_

### Environment file

```shell

```

### Docker-Compose file

```shell

```

### Relevant logs

```shell

```