High DPI setup.

[dumol]

This adds a PixelPerfect FontConfig setup geared towards high DPI displays such as modern laptops, tablets, and smartphones.

If you are using a low DPI device (less than 120 dpi) stick to the master branch for now, as more configuring is needed to test this branch in such a scenario. (Improvements are coming your way too, be patient.)

How to test:

1. Make sure you move aside whatever you have in ~/.config/fontconfig and ~/.local/share/fonts
2. Clone this repo and check out this branch, then symlink the resulting directory to ~/.config/fontconfig.
3. Download the relevant pre-release 0.4beta1 tarballs from https://github.com/dumol/PixelPerfect/releases/tag/v0.4.0beta1. Those would be the common* and hidpi* packages.
4. Unpack those tarballs to ~/.local/share/fonts.
5. Configure your device to use System-ui or Inter for the interface text (these should be identical) and ui-monospace or JetBrains Mono for monospace text.
6. Log out and in again to fully propagate the changed settings.
7. If you use Flatpak and/or apps, run the instructions added to the README through 06bfc73.

Check out https://reeddesign.co.uk/test/webfonts.html to see the improvements. Many other web pages should benefit from this setup, including GitHub's web interface here.

Do let me know your thoughts on this, thanks!