chore: Reorganize files into folders

to make it plain where each file belongs in the containers file system
and to simplify the `ADD` directives in the Containerfile.

Signed-off-by: Andreas Hartmann <hartan@7x.de>

home/podman/.config/systemd/user/podman.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=Podman API Service
+Requires=podman.socket
+After=podman.socket
+Documentation=man:podman-system-service(1)
+StartLimitIntervalSec=0
+
+[Service]
+Delegate=true
+Type=exec
+KillMode=process
+Environment=LOGGING="--log-level=warn"
+ExecStart=/usr/bin/podman $LOGGING system service
+StandardOutput=journal+console
+StandardError=inherit
+
+[Install]
+WantedBy=default.target

home/podman/.config/systemd/user/podman.socket

@@ -0,0 +1,11 @@
+[Unit]
+Description=Podman API Socket
+Documentation=man:podman-system-service(1)
+
+[Socket]
+ListenStream=/home/runner/podman.sock
+SocketGroup=runner
+SocketMode=0660
+
+[Install]
+WantedBy=sockets.target

home/podman/.config/systemd/user/prune.service

@@ -0,0 +1,6 @@
+[Unit]
+Description=Prune all disused podman volumes, images, and containers
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/podman system prune --all --force

home/podman/.config/systemd/user/prune.timer

@@ -0,0 +1,6 @@
+[Unit]
+Description=Execute the prune service periodically
+
+[Timer]
+OnCalendar=@@@PRUNE_INTERVAL@@@
+RemainAfterElapse=no