Initial task to establish the repository structure

[x] This repository fulfils all the requirements mentioned in the SBB Open Source Guidelines
[x] General configuration must be set as https://github.com/SchweizerischeBundesbahnen/open-source-polarion-java-repo-template/settings
[x] Branch protection rules must be configured as https://github.com/SchweizerischeBundesbahnen/open-source-polarion-java-repo-template/settings/branches
[x] FOR PUBLIC REPOSITORIES Code Security and analysis must be configured as https://github.com/SchweizerischeBundesbahnen/open-source-polarion-java-repo-template/settings/security_analysis
[x] FOR PUBLIC REPOSITORIES Set "Require approval for all outside collaborators" for PR from forks in https://github.com/SchweizerischeBundesbahnen/open-source-polarion-java-repo-template/settings/actions
[x] Update README.md file containing all the basic information about your project
[x] License files must be always inherited from template
[x] CONTRIBUTING.md file must be always inherited from the template
[x] CODE_OF_CONDUCT.md file will be linked from the organisation
[x] CODING_STANDTARDS file must be always inherited from the template
[x] SECURITY.md file will be linked from the organisation
[x] CHANGELOG.md file must be generated automatically by the Release Please GitHub action
[x] RELEASE.md file must be always inherited from the template for the standardised release procedure
[x] Have CI/CD been setup for the basic structure
[x] Configure secrets for actions
[x] Setup App Renovate for the repository
[x] Setup App Renovate-Approve for the repository
[x] /.github/CODEOWNERS
[x] /.github/pull_request_template.md
[x] /.github/ISSUE_TEMPLATE/issue_template.md

SchweizerischeBundesbahnen / ch.sbb.polarion.extension.json-editor

Initial task to establish the repository structure #1