Implement Decompression Filters for Incoming Requests

fixes #1035

Description

This PR introduces decompression filters that can be used to automatically decompress incoming payloads. This feature supports gzip, deflate and brotli decompression.

The decompression filters use the Content-Encoding header to determine if the incoming payload is compressed, and if so, what compression algorithm was used. If the payload is not compressed, the filters act as a no-op.

The new decompression filters can be used in the same way as the existing compression filters. Here is an example usage:

let upload = warp::path("upload")
  .and(warp::post())
  .and(warp::decompression::gzip())
  .and(warp::body::bytes())
  .map(|body: bytes::Bytes| ... do something);

Changes

• Added new decompression filter
• Implemented gzip, deflate, and brotli decompression filters.