image: Fix terminal size detection in slow/remote sessions

Remote or just generally slow sessions could have too high latency for the terminal response to get through before the timeout, rendering in-terminal image backends unusable. Increase the timeout to accommodate these.

See #1339.

Thank you for your contribution!

This PR is merged into hyfetch since this repo (dylanaraps/neofetch) seems no longer maintained.

HyFetch is a fork of neofetch with LGBTQ pride flags, but the repo also maintains an updated version of the original neofetch, addressing many pull requests that are not merged in the original repo.

Read the "Running Updated Original Neofetch" section for more info!

@hykilpikonna Thanks for merging this and the other PRs! If Neofetch has become unmaintained, that's saddening but not unusual. I hope the maintainer will come back or formally pass the torch. It's too common for one-person projects to run out of steam and flounder, and sometimes years go by without a clear successor. Speaking from general experience -- again I don't know what's the case here :-)