fork of nixinfo designed to be as fast as possible, using lessons learned from making tuxfetch

this fork will eventually be used in the rust rewrite of tuxfetch

also if I can upstream these changes to nixinfo this project will be archived

~~gpu fetch that doesn't rely on grep and lspci (should be 0.3ms)~~
apk package fetch that doesn't rely on the very slow apk executable (should be 1ms for ~700 packages)
use cpuid instruction on x86 (basically instant)
use uname syscall for kernel version (basically instant)
dpkg package fetch that doesn't rely on the executable
more resilient wm fetch
a screen resolution fetch

original decription

nixinfo

A lib crate for gathering system info such as cpu, distro, environment, kernel, etc in Rust.

To use: nixinfo = "0.3.2" in your Cargo.toml.

CPU model and temperature (Celsius)
- nixinfo::cpu() -> Result<String>
- nixinfo::temp() -> Result<String>
Device name
- nixinfo::device() -> Result<String>
Distro name
- nixinfo::distro() -> Result<String>
Environment (e.g. DE or WM)
- nixinfo::environment() -> Result<String>
env variables
- nixinfo::env("VARIABLE") -> Option<String>
GPU info (requires lspci and grep to be installed for now until I find a pure rust solution)
- nixinfo::gpu() -> Result<String>
Hostname
- nixinfo::hostname() -> Result<String>
Kernel
- nixinfo::kernel() -> Result<String>
Total memory in MBs
- nixinfo::memory() -> Result<String>
Music info
- Features for this:
  - music_mpd for music info from mpd
  - music_playerctl for music info from an MPRIS supporting program via playerctl
  - Enable neither of the features to get an N/A message
- nixinfo::music() -> String
Package counts (managers supported are apk, apt, dnf, dpkg, eopkg, pacman, pip, portage, rpm, and xbps)
- nixinfo::packages("manager") -> Result<String>
Terminal being used (unless tmux is used, in which case N/A will be outputted because reasons)
- nixnfo::terminal() -> Result<String>
Uptime of device
- nixinfo::uptime() -> Result<String>