Fix types

[PaulKGrimes]

Add 'raw' SMA-X type that goes to Python bytes - this is intended as a fallback/debug type.

Rearrange _TYPE_MAP etc. so that smax-python only writes standard smax-types, and reads to numpy floats and ints by default

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.92593% with 13 lines in your changes missing coverage. Please review.

Project coverage is 46.96%. Comparing base (8035bac) to head (2b2e505).
Report is 37 commits behind head on main.

Files with missing lines	Patch %	Lines
src/smax/smax_redis_client.py	22.22%	7 Missing ⚠️
src/smax/smax_data_types.py	86.66%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #21      +/-   ##
==========================================
+ Coverage   45.93%   46.96%   +1.02%     
==========================================
  Files           5        5              
  Lines        1502     1550      +48     
==========================================
+ Hits          690      728      +38     
- Misses        812      822      +10     

Flag	Coverage Δ
unittests	46.96% <75.92%> (+1.02%)	⬆️

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