major restructuring for using snowfall

modules/home/zsh/default.nix

@@ -0,0 +1,47 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let cfg = config.modules.shell.zsh;
+in {
+  options.modules.shell.zsh = { enable = mkOption { default = false; }; };
+
+  config = mkIf cfg.enable {
+
+    home.file = { ".config/starship.toml".source = ./starship.toml; };
+
+    home.packages = with pkgs; [ starship ];
+
+    programs.starship = {
+      enable = true;
+      enableZshIntegration = true;
+    };
+
+    programs.zsh = {
+      enable = true;
+
+      initExtra = builtins.readFile ./key-bindings.zsh
+        + builtins.readFile ./functions.zsh
+        + builtins.readFile ./last-working-dir.zsh
+        + builtins.readFile ./dir-navigation.zsh;
+
+      zplug = {
+        enable = true;
+        plugins = [
+          # list of plugins: https://github.com/unixorn/awesome-zsh-plugins
+          { name = "agkozak/zsh-z"; }
+          {
+            name = "zsh-users/zsh-completions";
+          }
+
+          # make it behave like fish
+          { name = "zsh-users/zsh-autosuggestions"; }
+          { name = "zsh-users/zsh-history-substring-search"; }
+          {
+            name = "zsh-users/zsh-syntax-highlighting";
+          } # must be last sourced plugin
+        ];
+      };
+    };
+  };
+}