XML to JSON Converter

Input (XML):

<person>
  <name>Alice</name>
  <age>25</age>
</person>

Output (JSON):

{
  "person": {
    "name": "Alice",
    "age": "25"
  }
}

Input (XML):

<book id="1" year="2023">
  <title>JavaScript</title>
  <author>John</author>
</book>

Output (JSON):

{
  "book": {
    "@id": "1",
    "@year": "2023",
    "title": "JavaScript",
    "author": "John"
  }
}

Input (XML):

<library>
  <book>
    <title>JS Guide</title>
  </book>
  <book>
    <title>Python</title>
  </book>
</library>

Output (JSON):

{
  "library": {
    "book": [
      { "title": "JS Guide" },
      { "title": "Python" }
    ]
  }
}