add charm packages, fix neovim tree height

modules/shell/charm.nix

@@ -0,0 +1,12 @@
+{ config, pkgs, ... }: {
+
+  home-manager.users.${config.user} = {
+
+    home.packages = with pkgs;
+      [
+        skate # Key-value store
+      ];
+
+  };
+
+}

modules/shell/default.nix

@@ -1,6 +1,7 @@
 { ... }: {
   imports = [
     ./age.nix
+    ./charm.nix
     ./direnv.nix
     ./fish
     ./fzf.nix