Feature/output stream

[Climbatize]

After I migrated from the original com.github.kenglxn.QRGen lib 3.0.1 I needed an OutputStream method to avoid changing my current architecture.

This PR brings the neew method QrGenerator.writeTo(String, OutputStream) that returns writes to a given OutputStream for a given payload without touching the file system.

you can test my fork by depending on:

{ group = "com.github.yepngo" , name = "qrgen" , version.ref = "3.0.1-yepngo.2" }

Usage:

Java example:

        final byte[] imageBytes;
        try (final ByteArrayOutputStream output = new ByteArrayOutputStream()) {
            generator.writeTo("Hello, World!", output);
            imageBytes = output.toByteArray();
        }

Kotlin example:

        val pngOutputStream = ByteArrayOutputStream()
        
        return pngOutputStream.use { output ->
            generator.writeTo("Hello, World!", output)
            output.toByteArray()
        }