feat: support timestamp type

[tkrs]

No description provided.

[codecov]

Codecov Report

Merging #220 (a657928) into master (1d9bf2e) will decrease coverage by 0.80%.
The diff coverage is 7.69%.

@@            Coverage Diff             @@
##           master     #220      +/-   ##
==========================================
- Coverage   49.58%   48.78%   -0.81%     
==========================================
  Files          17       17              
  Lines         486      494       +8     
  Branches       21       22       +1     
==========================================
  Hits          241      241              
- Misses        245      253       +8     

Flag	Coverage Δ
unittests	48.78% <7.69%> (-0.81%)	⬇️

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Impacted Files	Coverage Δ
...dules/core/src/main/scala/mess/codec/Decoder.scala	83.33% <0.00%> (-2.39%)	⬇️
...dules/core/src/main/scala/mess/codec/Encoder.scala	80.55% <0.00%> (-2.31%)	⬇️
modules/core/src/main/scala/mess/Fmt.scala	53.33% <10.00%> (-1.31%)	⬇️

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