Simple Binary Encoding codec generator for C++20 [WIP]
- spec https://github.com/FIXTradingCommunity/fix-simple-binary-encoding
 - inspired by https://github.com/real-logic/simple-binary-encoding
 
- nested composite enum/set/composite types
 - tests
 - ci integration
 - cmake integration
 - rust support?
 - python support?
 - (cppng) from/to json serialization
 - (cppng) set/get fixed-length strings as variable length string (trim till '\0')
 - (cppng) calculate buffer size for a message
 - tests