Merge branch 'master' into docker

docs/dev-tools/debugging.md

docs/documentation.md

docs/extensions/civix.md

docs/hooks/hook_civicrm_alterAPIPermissions.md

docs/hooks/hook_civicrm_buildProfile.md

docs/hooks/hook_civicrm_contactListQuery.md

docs/hooks/hook_civicrm_optionValues.md

docs/hooks/hook_civicrm_processProfile.md

docs/hooks/hook_civicrm_searchProfile.md

docs/hooks/hook_civicrm_validateProfile.md

docs/hooks/hook_civicrm_viewProfile.md

docs/hooks/setup/symfony.md

mkdocs.yml