Consider using `orjson` (optimization candidate)

[Pijukatel]

Test if using orjson instead of json can lead to measurable speed improvements in Crawlee - (mainly in storages?). Consider using it if yes.

[Mantisus]

Good idea!

[Mantisus]

I experimented with orjson in crawlee, testing FileSystemStorageClient and RedisStorageClient with a large number of records separately and during actual crawler runs.

Unfortunately, I didn't see any noticeable performance improvement.