Add named IDs to stregsystemet

[Zaph-x]

This pull request adds named IDs to stregsystemet.
This has been requested by several fembers since STS got named IDs as shorthands for buying.
The named IDs do not change the way products are parsed when purchases, as they are handled in pre-processing. This means the user does not need to know about the IDs, however may use them if they are known to the user.
An example of a named ID purchase is tester øl which would be preprocessed to tester 14 by looking for a named ID in the database linked to øl. If an ID is not found, the string is left as is (e.g. tester asdfghjkl would remain the same) and give a parse error.

[codecov-commenter]

Codecov Report

Merging #295 (7e40718) into next (2b8ac75) will increase coverage by 0.39%.
The diff coverage is 92.59%.

@@            Coverage Diff             @@
##             next     #295      +/-   ##
==========================================
+ Coverage   82.44%   82.84%   +0.39%     
==========================================
  Files          31       31              
  Lines        2518     2623     +105     
  Branches      182      188       +6     
==========================================
+ Hits         2076     2173      +97     
- Misses        412      418       +6     
- Partials       30       32       +2     

Impacted Files	Coverage Δ
stregsystem/templatetags/stregsystem_extras.py	89.28% <72.72%> (-10.72%)	⬇️
stregsystem/views.py	56.71% <75.00%> (+0.81%)	⬆️
stregsystem/models.py	88.18% <88.88%> (+0.01%)	⬆️
stregsystem/admin.py	74.22% <100.00%> (+0.82%)	⬆️
stregsystem/tests.py	99.79% <100.00%> (+0.01%)	⬆️

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[hrjakobsen]

I haven't tested this, only read the code changes, and left some comments based on that. I think some more validation of the names of NamedProduct are required.

[joandrsn]

[hrjakobsen]

I think alias handling in views could be handled better.

• Why do we show a random alias instead of all?
• Why do we have to show an alias if none exist? (N/A -> id)

However this is nothing that blocks merging.

Resolved