zsh: added shell configurations

nix/modules/shell.nix

@@ -0,0 +1,50 @@
+{ config, lib, pkgs }:
+
+{
+  programs.zsh.enable = true;
+
+  environment.systemPackages = with pkgs; [
+    git
+    tmux
+    tlrc
+    file
+    stow
+    btop
+    jq
+    fzf
+    killall
+    ripgrep
+    wget
+
+    ffmpeg
+    imagemagick
+  ];
+
+  programs.direnv = {
+    enable = true;
+    silent = true;
+    loadInNixShell = true;
+    nix-direnv.enable = true;
+
+    direnvrcExtra = ''
+      export PROMPT="* $PROMPT"
+    '';
+  };
+
+  programs.neovim = {
+    enable = true;
+    vimAlias = true;
+    viAlias = true;
+    withRuby = true;
+    withPython3 = true;
+    withNodeJs = true;
+  };
+
+  neovim = pkgs.neovim.override {
+    nativeBuildInputs = with pkgs; [
+      cargo
+      nodejs
+      go
+    ];
+  };
+}