refactor(flake): re-organise systems and modules

system/nixos/home-manager.nix

@@ -0,0 +1,50 @@
+{ inputs, pkgs, ... }:
+
+{
+  imports = [
+    ../../home-manager/modules/common.nix
+    ../../home-manager/modules/git.nix
+    ../../home-manager/modules/home-manager.nix
+    ../../home-manager/modules/tmux.nix
+    ../../home-manager/modules/zsh.nix
+  ];
+
+  home.stateVersion = "22.05";
+
+  home.username = "opdavies";
+  home.homeDirectory = "/home/opdavies";
+
+  programs.firefox = {
+    enable = true;
+    package = pkgs.firefox-devedition;
+  };
+
+  programs.alacritty = {
+    enable = true;
+
+    settings = {
+      window.opacity = 0.9;
+
+      window.padding = {
+        x = 15;
+        y = 15;
+      };
+
+      font = {
+        size = 12.0;
+
+        normal.family = "JetBrainsMono Nerd Font Mono";
+        italic.style = "Regular";
+        bolditalic.style = "Regular";
+        bold.style = "Regular";
+
+        offset.y = 12;
+        glyph_offset.y = 6;
+      };
+
+      shell = { program = "zsh"; };
+    };
+  };
+
+  home.packages = with pkgs; [ discord meslo-lg slack teams vlc wofi xcape zoom-us ];
+}