treewide: meson deprecation and freebsd fixes

[khaneliman]

• [x] Clean up deprecations
• [x] Fix freebsd build
  • Looks like we reference std::ranges and dont need this. It's breaking freebsd build.

Documentation seemed a little confusing on the temperature paths thing... took some trial and error to figure out what it needed to be parsed properly.

Tested with

"hwmon-path-abs": [
        "/sys/devices/pci0000:00/0000:00:18.3/hwmon/"
      ],
"input-filename": "temp3_input",

and

"hwmon-path-abs": "/sys/devices/pci0000:00/0000:00:18.3/hwmon",
"input-filename": "temp3_input",