Add support for ranged read.

[gafiatulin]

Some blob stores support ranged gets a la HTTP Range header.

Currently this can be emulated by dropping and taking on returned stream, but this still requires downloading all data to be dropped later. Consider for example extreme case of downloading entire content just to check if csv file has trailing newline while knowing the size of that file.

Can expose this in a Store[F].get by falling back to dropping and taking for stores that don't support ranged access.

Relevant information about ranged downloads:

• Azure
• S3
• GCS