Allow to transfer hidden folder

I try to transfer a hidden folder like ".github/folder/", after the transfer gets finished every is fine just the aim host doesn't contain the file.

FYI, the example pipeline is below. Thanks :)

```
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Copy file
uses: appleboy/scp-action@v0.1.7
env:
PUBLIC_IP: input your host
with:
host: ${{ env.PUBLIC_IP }}
username: username
password: ${{ secrets.PIPELINE_VM_PASSWORD }}
port: 22
source: ".github/folder"
target: "~/aim_folder"
```

Start with the example GitHub Actions workflow and reproduce the transfer using source ".github/folder" containing a file. Inspect how the action handles source paths and hidden entries, then verify that the hidden folder and its file appear under the target path on the remote host.

Written by the indexing model from the issue text.