add contents to DTAP section

docs/architecture/dtap/acceptance.md

docs/architecture/dtap/development.md

docs/architecture/dtap/index.md

docs/architecture/dtap/production.md

docs/architecture/dtap/test.md

includes/glossary.md

mkdocs.yml

vale/styles/config/vocabularies/geant-jargon/accept.txt

vale/styles/config/vocabularies/technical-terms/accept.txt