airframe-codec: #1093 Add MessageCodec.fromString(String)

[xerial]

Closes #1093

[codecov]

Codecov Report

Merging #1095 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1095   +/-   ##
=======================================
  Coverage   82.46%   82.46%           
=======================================
  Files         270      270           
  Lines       10292    10298    +6     
  Branches      670      698   +28     
=======================================
+ Hits         8487     8492    +5     
- Misses       1805     1806    +1     

Impacted Files	Coverage Δ
...main/scala/wvlet/airframe/codec/MessageCodec.scala	85.45% <100.00%> (+0.26%)	⬆️
...cala/wvlet/airframe/http/HttpClientException.scala	75.75% <0.00%> (-1.30%)	⬇️
...c/main/scala/wvlet/airframe/control/Parallel.scala	94.23% <0.00%> (+1.92%)	⬆️

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[shimamoto]

Thanks