Add first class support to Wikidata in the backend

[HarelM]

• It adds a Wikidata source (that will replace the he and en wikipedia sources in the future).
• It allows adding links to Wikidata from the POI edit window.
• It merges between Wikidata and Wikipedia, and between OSM and Wikidata
• It merges iNature links as well (ref:IL:inature) as part of the merge algorithm
• It removes the updates and track of deleted POIs (in continue to Move Points of interest to use tiles #1979 )
• Resolves Add support for wikidata #2007

[CLAassistant]

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[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 92.50000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 90.46%. Comparing base (36c817b) to head (a1b30db).

Files with missing lines	Patch %	Lines
...sraelHiking.API/Executors/FeaturesMergeExecutor.cs	91.66%	4 Missing and 2 partials ⚠️
...iking.API/Services/Poi/PointsOfInterestProvider.cs	91.30%	0 Missing and 2 partials ⚠️
...PI/Services/Poi/WikidataPointsOfInterestAdapter.cs	94.73%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2075      +/-   ##
==========================================
+ Coverage   90.43%   90.46%   +0.03%     
==========================================
  Files         100      101       +1     
  Lines        8520     8572      +52     
  Branches     1070     1074       +4     
==========================================
+ Hits         7705     7755      +50     
- Misses        586      589       +3     
+ Partials      229      228       -1     

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