The battery indicator should only be shown on devices with a battery
power supply. It should not be shown when a wireless USB device is
attached that happens to have a battery. This patch potentially fixes
the issue of showing a 0% battery reading on desktops.
Use `k10temp-pci-00c3` sensor output instead of
`asus_wmi_sensors-virtual-0` to read the CPU temperature because on the
ASUS Prime x470 Pro the latter is buggy and can result in the UEFI fan
control either slamming at 100% or not registering a temperature change
at full load.
Update the `system-info` directory with the addition of a `systemd`
service file and an new Linux script to display current CPU temperature
and core/thread utilization. Update `.conduit.yaml` with addition
`apt` dependencies `sysstat` and `jq`. Update the install and remove
scripts to setup and tear down the `systemd` user unit. Lastly, decrease
the `tmux` status line update interval from 5 to 2 seconds.
