Add stock list

[jjmachan]

Description

Why is this change required? What problem does it solve? Describe your changes in detail:

added a cli command stock list to view the 3 different shelves easily.

If it fixes an open issue, please link to the issue here:

Screenshots (if appropriate):

Types of changes

What types of changes does your code introduce? Put an x in all the boxes that apply:

• [ ] Documentation update
• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

List of items to check before submitting your PR. Note that this are only for helping you remember what you might (also) need to do and are not mandatory requirements

• [ ] Documentation is updated
• [ ] docs/changelog.md is updated
• [ ] Added test cases

[codecov-commenter]

Codecov Report

Merging #40 into master will increase coverage by 1.25%. The diff coverage is 98.63%.

@@            Coverage Diff             @@
##           master      #40      +/-   ##
==========================================
+ Coverage   93.13%   94.38%   +1.25%     
==========================================
  Files          23       25       +2     
  Lines         845      980     +135     
  Branches       62       75      +13     
==========================================
+ Hits          787      925     +138     
+ Misses         43       39       -4     
- Partials       15       16       +1     

Impacted Files	Coverage Δ
stockroom/cli.py	91.74% <95.34%> (+7.53%)	:arrow_up:
stockroom/console.py	100.00% <100.00%> (ø)
tests/test_cli.py	100.00% <100.00%> (ø)
tests/test_console.py	100.00% <100.00%> (ø)

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