Adds "active" field for Company model

[SchrodingersGat]

This PR adds the the ability to disable individual companies by setting an "active" flag for companies (suppliers / manufacturers / customers) allowing them to be disabled by the user.

Additionally, adds an "active" field to the SupplierPart model - so that a particular SupplierPart instance can be marked as disabled, but not removed from the database - for the purpose of retaining historical purchase order information.

• Closes [Feature] Add "active" flag to Company model #6491

TODO

• Add new field and migrations
• Expose to API and allow filtering
• Update CUI company table
• Update PUI company table
• Filter SupplierPart list by supplier__active
• Filter ManufacturerPart list by manufacturer__active
• Hide inactive customers when creating new sales order
• Hide inactive customers when creating new return order
• Hide inactive suppliers when creating new purchase order
• Hide inactive supplier parts in forms
• add unit testing
• improve documentation

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[codecov]

Codecov Report

Attention: Patch coverage is 98.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 83.24%. Comparing base (cd53f21) to head (82501f2).
Report is 2 commits behind head on master.

Files	Patch %	Lines
src/backend/InvenTree/InvenTree/settings.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7024      +/-   ##
==========================================
+ Coverage   83.17%   83.24%   +0.06%     
==========================================
  Files        1039     1038       -1     
  Lines       45515    45493      -22     
  Branches     1254     1244      -10     
==========================================
+ Hits        37857    37870      +13     
+ Misses       7405     7376      -29     
+ Partials      253      247       -6     

Flag	Coverage Δ
backend	85.45% <98.00%> (+0.02%)	⬆️

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[SchrodingersGat]

@matmair having some issues with the playwright tests here - it gets most of the way through but the "submit" button in one of the modal forms does not activate, even if I change the value of a field in the form. Any ideas here? I think this was one of the tests you added just recently so presumably it does work...