Function encodeToPDFDocEncoding

encodeToPDFDocEncoding(str: string): ByteArray
Encodes a JavaScript string to PDFDocEncoding bytes.

PDFDocEncoding is the default encoding for PDF strings:
- Bytes 0-127: Standard ASCII
- Bytes 128-159: Special Unicode characters (see PDF spec)
- Bytes 160-255: ISO Latin-1 (ISO 8859-1)
Parameters
- str: string
  The string to encode.
Returns ByteArray
The encoded byte array.
Example
```
// Encode "Hello" (ASCII)
encodeToPDFDocEncoding('Hello')

// Encode with special character (bullet → 0x80)
encodeToPDFDocEncoding('H•i')
```
- Defined in packages/pdf-lite/src/utils/encodeToPDFDocEncoding.ts:24