Update for the latest SMA-X specification

[PaulKGrimes]

This PR brings the available types for pushing to SMA-X into line with the latest strict specification. At the same time, it enables a wider range of types for pulling from SMA-X, for backwards compatibility.

New features:

• integers or floats shared to SMA-X that overflow the requested type will automatically be promoted to the necessary width.
• a 'maintain_type' option to smax_share has been added to retrieve the current SMA-X type from the SMA-X server, and cast the input value(s) to that type
• a 'raw' option has been added to smax_pull, to directly return the byte sequence returned by Redis, for debugging purposes.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 82.60870% with 36 lines in your changes missing coverage. Please review.

Project coverage is 48.80%. Comparing base (2b2e505) to head (9a0c811).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/smax/smax_redis_client.py	81.25%	36 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #22      +/-   ##
==========================================
+ Coverage   46.96%   48.80%   +1.83%     
==========================================
  Files           5        5              
  Lines        1550     1635      +85     
==========================================
+ Hits          728      798      +70     
- Misses        822      837      +15     

Flag	Coverage Δ
unittests	48.80% <82.60%> (+1.83%)	⬆️

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