feat!: pass default values thorugh casting & transformation

chore: upgrade to actions/checkout@v4

chore: run tests for ruby 3.2 and 3.3 and no longer 2.6

chore: explicitly set the target version in rubocop

chore: bump minimum required ruby to 2.7

fix: fixes issue with yaml source

fix: don't cast the value provided as a default

docs: add badges to readme

chore: add licence

docs: update version in README

feat: markdown exporter

feat: descriptions, blocks and improved transformation on arrays

docs: update reference to ENV

initial code

initial commit