A work-in-progress graphical process and system monitor for Linux

• Test on somewhat diverse computers

• proc: Search

• proc: libsystemd for lsid tab
• proc: Network tx/rx
• proc: GPU usage
• proc: PSS instead of RSS memory (avoid overcount of shared memory)
• sys/os: add panel with
  • uptime
  • process count
  • thread count
• sys/disk: usage and capacity. Per-folder breakdown?
• sys/cpu: per-cpu temperature?

• plot culling of sys tab

• settled for using pread64
• mmap seems to be unsupported, gives EIO. (And it wouldn't make sense given the single_open/show internal linux API)
• io_uring through tokio-uring is just barely on par with the sequential implementation after using sqpoll. No reason to use.