[WIP] Break down JxlDecoder to better support streaming, preview, animation, etc.
#366
| Job | Run time |
|---|---|
| 2m 3s | |
| 3m 56s | |
| 11s | |
| 2m 36s | |
| 3m 4s | |
| 2m 23s | |
| 1m 37s | |
| 5m 15s | |
| 3m 13s | |
| 24m 18s |