feat: add auto regenerated nix-index-database

chore: update to nixos-unstable

feat: add nur overlay and modules correctly

feat: use user packages instead of global

fix: add missing nur for desktop

feat: add Firefox with extensions

feat: add vscodium with extensions

Use custom doom emacs setup instead of nix-community/nix-doom-emacs[1;5D

fix: fix issues

fix: fix issues

feat: add initial configurations