Enhancement #811 for C++

[ygorelik]

Enhancement #811 for C++.
Introduced Codec feature to decode multiple JSON payload.

[codecov]

Codecov Report

Merging #812 into master will increase coverage by 0.01%.
The diff coverage is 86.53%.

@@            Coverage Diff             @@
##           master     #812      +/-   ##
==========================================
+ Coverage   81.04%   81.06%   +0.01%     
==========================================
  Files         171      171              
  Lines       17155    17231      +76     
  Branches     1542     1542              
==========================================
+ Hits        13904    13968      +64     
- Misses       2866     2878      +12     
  Partials      385      385

Impacted Files	Coverage Δ
sdk/cpp/core/src/types.hpp	94.11% <ø> (ø)	⬆️
sdk/cpp/core/src/path_api.hpp	71.42% <ø> (ø)	⬆️
sdk/cpp/core/tests/test_entity.cpp	83.2% <100%> (+1.22%)	⬆️
sdk/cpp/core/tests/test_codec.cpp	100% <100%> (ø)	⬆️
sdk/cpp/core/src/netconf_service.cpp	77.15% <55.55%> (-3.17%)	⬇️
sdk/cpp/core/src/crud_service.cpp	89.41% <88.23%> (-0.37%)	⬇️
sdk/cpp/core/src/value_list.cpp	60.98% <88.88%> (+3.06%)	⬆️
sdk/cpp/core/src/path/path.cpp	84.3% <90.9%> (+0.96%)	⬆️

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[ghost]

Thanks, @ygorelik . Can you please address the codacy issues (https://app.codacy.com/app/ydk/ydk-gen/pullRequest?prid=1937292)?

[ghost]

https://app.codacy.com/app/ydk/ydk-gen/pullRequest?prid=1937292

[ygorelik]

Added ylist enhancement for Go accompanied with new test cases and documentation.