Channel setup builder

[adam-fowler]

Setup type for building HBChannelSetup. Cleans up API

let app = HBApplication(
    responder: router,
    channelSetup: .http1(),
    ...
)

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (949b84c) 84.55% compared to head (c6a658f) 84.51%.

Files	Patch %	Lines
...ces/HummingbirdCore/Server/HTTP/HTTP1Channel.swift	0.00%	1 Missing ⚠️
Sources/HummingbirdHTTP2/HTTP2Channel.swift	66.66%	1 Missing ⚠️
Sources/HummingbirdTLS/TLSChannelSetup.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            2.x.x     #310      +/-   ##
==========================================
- Coverage   84.55%   84.51%   -0.05%     
==========================================
  Files          79       82       +3     
  Lines        4525     4539      +14     
==========================================
+ Hits         3826     3836      +10     
- Misses        699      703       +4     

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[github-actions]

Pull request benchmark comparison [ubuntu-latest] with '2.x.x' run at 2023-12-16T10:59:43+00:00
Pull request had performance regressions

[Joannis]

I like this change a LOT. 100% behind this