[source-sftp-bulk] Bulk Load Excel Files , reader options

### Connector Name

Bulk SFTP 

### Connector Version

1.5.0

### What step the error happened?

Configuring a new connector

### Relevant information

This connector do not implement
reader_options (names, header, and skiprows) 

We are trying to bulk load several excel files with 4 empty lines to skip.


### Relevant log output

```shell

```

### Contribute

- [ ] Yes, I want to contribute