Add Link Headers

[alexanderkiel]

Add link headers according to RFC 8288 to responses with searchset bundles. This enabled clients to obtain links without the need to parse the bundle itself. The idea is to lower the time a client needs to request the next page.

[codecov]

Codecov Report

Merging #1003 (80c0e46) into develop (0d6f225) will increase coverage by 0.01%.
The diff coverage is 97.36%.

❗ Current head 80c0e46 differs from pull request most recent head 935242c. Consider uploading reports for the commit 935242c to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1003      +/-   ##
===========================================
+ Coverage    94.20%   94.22%   +0.01%     
===========================================
  Files          238      239       +1     
  Lines        15233    15258      +25     
  Branches       374      373       -1     
===========================================
+ Hits         14351    14377      +26     
  Misses         508      508              
+ Partials       374      373       -1     

Impacted Files	Coverage Δ
modules/rest-api/src/blaze/rest_api/routes.clj	97.52% <96.15%> (+0.17%)	⬆️
...api/src/blaze/rest_api/middleware/link_headers.clj	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes