Adds Get Closest Image endpoint

[akash5100]

• closes Official Clients - getClosestImage endpoint  #16

[codecov-commenter]

Codecov Report

Merging #39 (ee68f33) into main (a5eaac4) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #39   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           10        11    +1     
  Lines          153       172   +19     
=========================================
+ Hits           153       172   +19     

Impacted Files	Coverage Δ
...y/api_groups/official_clients/get_closest_image.py	100.00% <100.00%> (ø)
hvpy/facade.py	100.00% <100.00%> (ø)
hvpy/parameters.py	100.00% <100.00%> (ø)

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