feat(timer-event): add ISO 8601 reference
Merge branch 'master' of github.com:camunda/docs.camunda.org
Merge branch 'master' of github.com:camunda/docs.camunda.org
docs(readme): improve README.md
fix(user-guide): Remove duplicated "cycle" chapter.
Merge branch 'master' of github.com:camunda/docs.camunda.org
feat(user-guide): add supported environments

related to CAM-774
doc(user/group): add docs for user & group crud

related to #CAM-957 #CAM-958
Merge branch 'master' of github.com:camunda/docs.camunda.org

Conflicts:
	site/src/documents/api-references/rest/single-page.html.eco
	site/src/documents/api-references/rest/toc.html.md
	site/src/files/app/js/pages.js
doc(user/group): add toc & single page

related to #CAM-957, #CAM-958
style(user-guide): Change listing supported environments
doc(rest): update user password

related to #CAM-990
Merge branch 'master' of github.com:camunda/docs.camunda.org
fix(migration-guide): align chapter naming
doc(rest api): group memberships

related to #CAM-959
Merge branch 'master' of github.com:camunda/docs.camunda.org
fix(migration-guide): change logo of was
impr(rest): fix user & group resource paths

related to #CAM-957 #CAM-958 #CAM-959
Merge branch 'master' of github.com:camunda/docs.camunda.org
chore(type): Add support of variable types

related to CAM-918