trillium-compression-v0.3.1

Added

• Client-side Compression handler behind the new client feature
  (trillium_compression::client::Compression). Implements ClientHandler
  bidirectionally:
  • Responses: advertises Accept-Encoding on outbound requests and
    transparently decodes brotli/gzip/zstd response bodies, stripping
    Content-Encoding so callers read plaintext.
  • Requests (opt-in): compresses the request body and sets Content-Encoding
    when a request encoding is selected — handler-wide via
    Compression::with_default_encoding, or per request by setting a
    CompressionAlgorithm on the conn's state (which overrides the default).
• CompressionAlgorithm::Identity, the identity content-coding. As a per-conn
  client state signal it opts a single request out of a configured default
  request encoding.