docs: REST API docs via Writerside

.gitlab-ci.yml

Dockerfile.help

HELP.md

README.md

SECURITY.md

serverpackcreator-api/src/jvmMain/resources/HELP.md

serverpackcreator-api/src/jvmMain/resources/README.md

serverpackcreator-help/Writerside/api-docs.yaml

serverpackcreator-help/Writerside/cfg/buildprofiles.xml

serverpackcreator-help/Writerside/images/img/cli.png

serverpackcreator-help/Writerside/images/img/configcheck.png

serverpackcreator-help/Writerside/images/img/configpanel.png

serverpackcreator-help/Writerside/images/img/gui_dark.png

serverpackcreator-help/Writerside/images/img/postgen.png

serverpackcreator-help/Writerside/images/img/pregen.png

serverpackcreator-help/Writerside/images/img/prezip.png

...erpackcreator-help/Writerside/images/img/tabextension.png

serverpackcreator-help/Writerside/images/img/web.png

serverpackcreator-help/Writerside/redirection-rules.xml

serverpackcreator-help/Writerside/spch.tree