Function flate

flate(): PdfFilter
Creates a Flate filter for compressing and decompressing PDF stream data. Uses the DEFLATE compression algorithm (same as zlib/gzip).

Returns PdfFilter
A PdfFilter object with encode and decode methods.
Example
```
const filter = flate()
const compressed = filter.encode(rawData)
const decompressed = filter.decode(compressed)
```
- Defined in packages/pdf-lite/src/filters/flate.ts:18