Major config overhaul: use custom modules, setup for multi-host config, and less boilerplate

modules/themes/atelier-cave/README.org

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+#+title: Atelier Cave
+#+author: Emmet
+
+"Atelier Cave" base-16 theme originally by Bram de Haan ([[http://atelierbramdehaan.nl]]).
+
+[[https://raw.githubusercontent.com/librephoenix/nixos-config-screenshots/main/hyprland/atelier-cave.png]]
+
+[[https://images.hdqwalls.com/wallpapers/anime-girl-angel-ring-5k-7c.jpg][Background Link]]

modules/themes/atelier-cave/default.nix

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+{
+  scheme = "Atelier Cave";
+  slug = "atelier-cave";
+  author = "Bram de Haan (http://atelierbramdehaan.nl)";
+  description = ''A “cool-warm” palette; not for the claustrophobic'';
+  polarity = "dark";
+  backgroundUrl = "https://images.hdqwalls.com/wallpapers/anime-girl-angel-ring-5k-7c.jpg";
+  backgroundUrlSha256 = "sha256-AVPJYFLEQr9x1V2yQLkMc1g7GqcBPJiKRFuj8MaKe5c=";
+  base00 = "19171c";
+  base01 = "26232a";
+  base02 = "585260";
+  base03 = "655f6d";
+  base04 = "7e7887";
+  base05 = "8b8792";
+  base06 = "e2dfe7";
+  base07 = "efecf4";
+  base08 = "be4678";
+  base09 = "aa573c";
+  base0A = "a06e3b";
+  base0B = "2a9292";
+  base0C = "398bc6";
+  base0D = "576ddb";
+  base0E = "955ae7";
+  base0F = "bf40bf";
+}