Merge issue-32-ui-loader branch into master

resolves #32 add UI loader component

See merge request antora/antora-direct!23
4 jobs for master in 4 minutes and 50 seconds (queued for 1 second)
Status Job ID Name Coverage
  Setup
passed #39488647
yarn

00:02:55

 
  Verify
passed #39488650
commitlint

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passed #39488648
lint

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passed #39488649
test

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