build: add release workflow file

[paullatzelsperger]

What this PR changes/adds

Adds a workflow file to trigger the creation of a release on Jenkins using Github Actions.

Why it does that

Convenient way to create a new release/snapshot from withing Github

Further notes

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Linked Issue(s)

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Checklist

• added appropriate tests?
• performed checkstyle check locally?
• added/updated copyright headers?
• documented public classes/methods?
• added/updated relevant documentation?
• added relevant details to the changelog? (skip with label no-changelog)
• formatted title correctly? (take a look at the CONTRIBUTING and styleguide for details)

[codecov-commenter]

Codecov Report

Merging #33 (bee380a) into main (9ac1f2b) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main      #33   +/-   ##
=========================================
  Coverage     90.95%   90.95%           
  Complexity       91       91           
=========================================
  Files            25       25           
  Lines           398      398           
  Branches         18       18           
=========================================
  Hits            362      362           
  Misses           31       31           
  Partials          5        5           

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