Manpages for systemd

Because I seem to frequently search for these manpages:

• systemd.service: Service unit configuration
• systemd.unit: Unit configuration
• systemd.timer: Timer unit configuration
• systemd.exec: Execution environment configuration
• Also systemd.index: List all manpages from the systemd project

systemd versions in Debian Linux:

• Debian 13 Trixie: systemd 257
• Debian 12 Bookworm: systemd 252
• Debian 11 Bullseye: systemd 247
• Debian 10 Buster: systemd 241