chore: Delete not needed files

.gitattributes

.github/CONTRIBUTING.md

.github/FUNDING.yml

.github/ISSUE_TEMPLATE/config.yml

.github/ISSUE_TEMPLATE/issue.bug.md

.github/ISSUE_TEMPLATE/issue.feature.md

.github/PULL_REQUEST_TEMPLATE.md

.github/workflows/external_trigger.yml

.github/workflows/external_trigger_scheduler.yml

.github/workflows/greetings.yml

.github/workflows/package_trigger.yml

.github/workflows/package_trigger_scheduler.yml

.github/workflows/stale.yml

Jenkinsfile

jenkins-vars.yml

package_versions.txt

patch/etc/s6/init/init-stage2.patch

readme-vars.yml

root/docker-mods