qenya/zsh: Use powerlevel10k theme

Closes #15

home/qenya/default.nix

@@ -3,6 +3,7 @@
     ./dconf
     ./plasma
     ./firefox.nix
+    ./fontconfig.nix
     ./git.nix
     ./packages.nix
     ./tmux.nix

home/qenya/fontconfig.nix

@@ -0,0 +1,17 @@
+{ config, lib, pkgs, osConfig, ... }:
+
+let
+  inherit (lib) mkIf;
+  isGraphical = osConfig.services.xserver.enable;
+in
+mkIf isGraphical {
+  fonts.fontconfig = {
+    enable = true;
+  };
+
+  home.packages = with pkgs; [
+    meslo-lgs-nf
+  ];
+
+  programs.vscode.userSettings."terminal.integrated.fontFamily" = "MesloLGS NF";
+}

home/qenya/zsh.nix

@@ -16,7 +16,7 @@
       mv = "mv -i";
       rename = "rename -i";
 
-      nix-shell = ''nix-shell --command "zsh"''; # TODO: tweak theme to display something when inside nix-shell
+      nix-shell = ''nix-shell --command "zsh"'';
     };
 
     history = {
@@ -28,9 +28,14 @@
     oh-my-zsh = {
       enable = true;
       plugins = [ "git" "sudo" "direnv" ];
-      theme = "agnoster";
+      theme = ""; # defer to powerlevel10k
     };
 
+    initExtra = ''
+      source ${pkgs.zsh-powerlevel10k}/share/zsh-powerlevel10k/powerlevel10k.zsh-theme
+      source ${./.p10k.zsh}
+    '';
+
     envExtra = ''
       DEFAULT_USER=qenya
     '';