feat: support instance of pattern matching

[clementdessoude]

What changed with this PR:

Support instance of pattern matching: https://docs.oracle.com/javase/specs/jls/se16/html/jls-15.html#jls-InstanceofExpression

Example

// Input
class T {
    static String formatter(Object o) {
        String formatted = "unknown";
        if (o instanceof Integer i || p instanceof Point || q instanceof Circle c || r instanceof Square) {
            formatted = String.format("int %d", i);
        } else if (o instanceof Long l) {
            formatted = String.format("long %d", l);
        } else if (o instanceof Double d) {
            formatted = String.format("double %f", d);
        } else if (o instanceof String s) {
            formatted = String.format("String %s", s);
        }
        return formatted;
    }
}

// Output
class T {

  static String formatter(Object o) {
    String formatted = "unknown";
    if (
      o instanceof Integer i ||
      p instanceof Point ||
      q instanceof Circle c ||
      r instanceof Square
    ) {
      formatted = String.format("int %d", i);
    } else if (o instanceof Long l) {
      formatted = String.format("long %d", l);
    } else if (o instanceof Double d) {
      formatted = String.format("double %f", d);
    } else if (o instanceof String s) {
      formatted = String.format("String %s", s);
    }
    return formatted;
  }
}

Relative issues or prs:

Closes #434