Refactor iguana2

[qicosmos]

all use ylt.reflection, unify reflection interface.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 73.63636% with 145 lines in your changes missing coverage. Please review.

Project coverage is 45.72%. Comparing base (1d774ee) to head (f08ec4f).
Report is 30 commits behind head on master.

Files with missing lines	Patch %	Lines
benchmark/json_benchmark.h	0.00%	56 Missing ⚠️
iguana/common.hpp	79.03%	13 Missing ⚠️
benchmark/yaml_benchmark.hpp	0.00%	12 Missing ⚠️
example/xml_example.cpp	0.00%	12 Missing ⚠️
example/yaml_example.cpp	0.00%	12 Missing ⚠️
benchmark/xml_bench.hpp	0.00%	10 Missing ⚠️
example/json_example.cpp	0.00%	8 Missing ⚠️
benchmark/json_benchmark.cpp	0.00%	7 Missing ⚠️
iguana/ylt/reflection/member_names.hpp	55.55%	4 Missing ⚠️
test/test_reflection.cpp	0.00%	3 Missing ⚠️
... and 7 more

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #302      +/-   ##
==========================================
- Coverage   48.19%   45.72%   -2.48%     
==========================================
  Files          53       64      +11     
  Lines        6241     7563    +1322     
==========================================
+ Hits         3008     3458     +450     
- Misses       3233     4105     +872     

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