Set up Maven settings.xml for use in GitHub Actions

[NassimBtk]

Requirements

• Add to settings.xml servers server-id: github username: $GITHUB_ACTOR and password: $GITHUB_TOKEN.
• To download snapshot artifacts we need to add https://s01.oss.sonatype.org/content/repositories/snapshots to the repositories and plugin repositories list.