Expose Prettier configuration

[gkze]

• Expose Prettier configuration options, taken from http://json.schemastore.org/prettierrc
• Wrap Prettier invocation in a command that passes generated configuration file from passed options

[gkze]

Stacking on top of #102 to clear nix flake check warnings, happy to split

[zimbatm]

looks good. Can you just squash and rebase to remove the other changes from the PR?

[gkze]

Lmk if that works

[zimbatm]

thanks. I removed the wrapper as it wasn't necessary in the end. Maybe it's worth applying the same changes to drpint.

[gkze]

👍🏻 https://github.com/numtide/treefmt-nix/pull/105