refactor: Coroutine based webserver

[kuznetsss]

Code of new coroutine-based web server. The new server is not connected to Clio and not ready to use yet.
For #919.

[codecov]

Codecov Report

Attention: Patch coverage is 79.74684% with 112 lines in your changes missing coverage. Please review.

Project coverage is 71.67%. Comparing base (cf081e7) to head (a7a40d4).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/web/ng/Server.cpp	72.32%	31 Missing and 13 partials ⚠️
src/web/ng/impl/HttpConnection.hpp	56.25%	13 Missing and 15 partials ⚠️
src/web/ng/impl/WsConnection.hpp	72.72%	11 Missing and 1 partial ⚠️
src/web/ng/impl/ConnectionHandler.cpp	89.81%	4 Missing and 7 partials ⚠️
src/web/ng/impl/WsConnection.cpp	37.50%	9 Missing and 1 partial ⚠️
src/web/ng/Response.cpp	91.66%	2 Missing and 1 partial ⚠️
src/web/ng/Request.cpp	95.45%	1 Missing and 1 partial ⚠️
src/util/WithTimeout.hpp	93.33%	0 Missing and 1 partial ⚠️
src/web/Server.hpp	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1699      +/-   ##
===========================================
+ Coverage    71.30%   71.67%   +0.37%     
===========================================
  Files          266      276      +10     
  Lines        11143    11655     +512     
  Branches      5710     5929     +219     
===========================================
+ Hits          7945     8354     +409     
- Misses        1669     1730      +61     
- Partials      1529     1571      +42     

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[godexsoft]

The code looks great. It's a huge improvement over the current webserver implementation.
I left a few questions and suggestions. Also, feel free to sprinkle [[nodiscard]] where it makes sense and maybe noexcept too.

[cindyyan317]

💯 Nice ! I just leave some questions.