Change of synonymy

[karilint]

As a taxonomic coordinator,
I would like to change the taxonomy of Alopex lagopus to Vulpes lagopus and make Alopex a synonym of Vulpes.

A previous taxonomy of Alopex lagopus https://academic.oup.com/mspecies/article/doi/10.1644/0.713.1/2600806
is: order Carnivora, family Canidae, subfamily Caninae, genus Alopex

However, McKenna and Bell (1997) included Alopex as a congeneric taxon of Vulpes.
Order Carnivora, family Canidae, subfamily Caninae, genus Canis.
Therefore, Alopex Kaup, 1829 becomes a synonym of Vulpes Frisch, 1775 and Alopex lagopus has an accepted name of Vulpes lagopus.

See how this is managed in https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=622025#null
and https://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=14000865

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Acceptance Criteria:

• added synonym is linked to existing taxon
• synonym is added to the synonym-table in the database
• the same synynom can't be added twice
• synonym is visible in the taxon's page
• taxon is searchable via the synonym

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Ready when:

• Feature is implemented according to the Acceptance Criteria and it works as intended
• Documentation regarding the feature is written
• Code follows the agreed styling (creation of styling file is in this story)
• Code is reviewed (by 2 individuals other than the coder)
• Feature is merged into main and is on stating
• Feature is in production