Merge branch 'feature/move-sparql' into 'feature/update-landing-page'

.gitignore

.gitlab-ci.yml

docs/guides/sparql/about-sparql.md

docs/guides/sparql/intro.md

docs/guides/sparql/introduction.mdx

docs/guides/sparql/virtuoso-sparql.md

docs/guides/web-api/categories-api.md

docs/guides/web-api/hello-api.md

docs/guides/web-api/intro.md

docs/guides/web-api/introduction.md

docs/guides/web-api/json-ld-source-api.md

docs/guides/web-api/search-api.md

docs/guides/web-ui/intro.md

docs/guides/web-ui/introduction.md

docs/guides/web-ui/primary-features.md

docs/guides/web-ui/secondary-features.md

docs/index.md

sidebars.ts

static/img/SPARQL-query1-sample-results.png

static/img/fct-hzdr-results-ex.png