#61 Inline convert to Prefixed numbers

[dan-fritchman]

Replaces PR #72.

[codecov]

Codecov Report

Merging #80 (d3e5cff) into main (26e07bd) will increase coverage by 0.05%.
The diff coverage is 93.98%.

@@            Coverage Diff             @@
##             main      #80      +/-   ##
==========================================
+ Coverage   89.93%   89.99%   +0.05%     
==========================================
  Files          84       86       +2     
  Lines        6759     6845      +86     
==========================================
+ Hits         6079     6160      +81     
- Misses        680      685       +5     

Impacted Files	Coverage Δ
hdl21/proto/to_proto.py	85.43% <75.00%> (+0.43%)	⬆️
hdl21/prefix.py	95.25% <87.80%> (-1.86%)	⬇️
hdl21/scalar.py	96.42% <96.42%> (ø)
hdl21/__init__.py	100.00% <100.00%> (ø)
hdl21/literal.py	100.00% <100.00%> (ø)
hdl21/primitives.py	88.46% <100.00%> (-0.06%)	⬇️
hdl21/proto/from_proto.py	84.15% <100.00%> (+1.48%)	⬆️
hdl21/sim/data.py	90.59% <100.00%> (-0.16%)	⬇️
hdl21/sim/tests/test_sim.py	82.22% <100.00%> (ø)
hdl21/sim/to_proto.py	71.27% <100.00%> (-0.64%)	⬇️
... and 4 more

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