Refactor - Multiple Compression/Encoding Methods

[cseufert]

Refactored CompressEncoder to support multiple methods in a single middleware, with backward compact

• Single Middleware for compression, that out of the box configures itself based on what PHP extensions are available (zstd, or brotli)
• Orderable based on compression preference if required
• Individual compression methods can have their compression level adjusted where required.

To do:

• [x] Update Documentation
• [ ] Setup testing with zstd and brotli extensions loaded
• [x] Write an upgrade guide going from version 2.x to 3.x
• [ ] Fix/workaround PHP Stan warnings about brotli_compress
• [x] Add deprecation PHPDOC to GzipEncoder and Deflate Encoder classes
• [ ] Add unit tests for multiple compressor logic

[cseufert]

@oscarotero Could you let me know if this has the possibility of being merged (open to suggestions on structural changes).

[oscarotero]

Hi, @cseufert Thanks, I really like your proposal :).

• Due this is a breaking change, that will release a major version, maybe we don't need the shim to the old classes. The documentation from 2.x to 3.x is enough.
• I see that you missed the Deflate class in the allAvailableCompressor: https://github.com/moddengine/encoder/blob/cs-multi-compressor/src/CompressEncoder.php#L110

Let me know when you have finished with this changes and I'll merge it.