Allows setting maximum column width --columns-width

[jm66]

• If specified --columns-width or HASS_COL_WIDTH env var
  truncates column values
• Uses default const.COLUMNS_WIDTH_STR
• Fixes allow setting maximum column width (feature req) #253

[homeassistant]

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[codecov-io]

Codecov Report

Merging #306 into dev will decrease coverage by 0.24%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev     #306      +/-   ##
==========================================
- Coverage   75.25%   75.01%   -0.25%     
==========================================
  Files          22       22              
  Lines        1560     1545      -15     
==========================================
- Hits         1174     1159      -15     
  Misses        386      386

Impacted Files	Coverage Δ
homeassistant_cli/helper.py	74.74% <100%> (+0.78%)	⬆️
homeassistant_cli/const.py	100% <100%> (ø)	⬆️
homeassistant_cli/cli.py	76.66% <100%> (+0.53%)	⬆️
homeassistant_cli/plugins/raw.py	86.84% <0%> (-3.36%)	⬇️
homeassistant_cli/autocompletion.py	73.4% <0%> (-2.33%)	⬇️

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[jm66]

this is a mess. starting from scratch. sorry.