Merge branch 'master' of gitlab.tugraz.at:dbp/web-components/toolkit

README.md

packages/app-shell/src/app-shell.js

packages/auth/README.md

packages/auth/src/auth-keycloak.js

packages/language-select/src/dbp-language-select-demo.js

packages/language-select/src/language-select.js

packages/language-select/test/unit.js

packages/provider/README.md

packages/provider/src/adapter-lit-element.js

packages/provider/src/provider.js

toolkit-showcase/assets/dbp-toolkit-showcase.html.ejs

toolkit-showcase/yarn.lock