Gets the script (JS, required), decoded from its text string or text stream, or null. Never run.
public string? Script { get; }
ISO 32000-2 §12.6.4.17, Table 221, and §7.9.2.2: a byte order mark selects UTF-16BE or UTF-8, else PDFDocEncoding. A stream is decoded through its filters into new memory; the stream is not changed. The raw value is ScriptObject.