Not support included other xsl file in same xsl file, env: Xcode14.3, macOs 13.3, swift 5.8

[yekongle]

Not support included other xsl file in same xsl file, eg:

Style sheet sample file

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="html" version="1.0" encoding="utf-8" indent="yes"/>
         <xsl:include href="sample.xsl" />
....

when process swiftyXSLT.transformXMLData, error occurs as below:

I/O warning : failed to load external entity "sample.xsl"
compilation error: element include
xsl:include : unable to load sample.xsl