[BUG]: Image Example returns a Unhandled Rejection: TypeError: Only escpos.Image supported at: [object Promise]

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### Description of the bug

I'm trying to print this example

printer.align('ct')
.image(image, 's8')
.then(() => {
printer.cut()
.close();
});

my implementation

const imagePath = path.join(__dirname, '/assets/apple-icon.png');

escpos.Image.load(imagePath, function (image) {
device.open(function () {
printer
.align('ct')
.image(image, 's8')
.then(() => {
printer.cut().close();
});
});
});

i get

❌ error:
Unhandled Rejection: TypeError: Only escpos.Image supported at: [object Promise]

### Steps To Reproduce

empty

### Additional Information

_No response_

Start at escpos.Image.load and the printer.image call shown in the report, then reproduce the example with the provided apple-icon.png path. Trace why the image call receives a Promise instead of an escpos.Image; done means the example prints without the unhandled rejection and the existing cut-and-close flow still runs.

Written by the indexing model from the issue text.