Feature/43 filters

[Floris272]

Fixes #43 #42 #53

Changes

• moved viewsets to seperate files separate viewsets into files #42
• added filterset to each viewset
• Added producttype contentelement action filters ProductType filter toevoegen voor beperken ProductContent tot de content met specifieke labels (of juist niet) #53

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 98.63388% with 5 lines in your changes missing coverage. Please review.

Project coverage is 86.13%. Comparing base (f00b267) to head (93d4a0d).
Report is 35 commits behind head on master.

Files with missing lines	Patch %	Lines
...pen_producten/producttypen/viewsets/producttype.py	93.90%	2 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #60      +/-   ##
==========================================
+ Coverage   84.92%   86.13%   +1.21%     
==========================================
  Files         106      131      +25     
  Lines        2269     2626     +357     
  Branches      149      156       +7     
==========================================
+ Hits         1927     2262     +335     
- Misses        319      335      +16     
- Partials       23       29       +6     

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[stevenbal]

@Floris272 is this based on another PR? I think I've seen the translation changes in #55 as well

[Floris272]

It's not based on #55 but i needed the translations & other api spec fixes here too so that the oas checks pass.

[stevenbal]

@Floris272 can you rebase on master?

[danielmursa-dev]

Some minor changes