add tmux back and update

programs/tmux/default.nix

@@ -0,0 +1,35 @@
+{ pkgs, ... }:
+
+let
+  tmuxConfig = builtins.readFile ./tmux.conf;
+in
+{
+  programs.tmux = {
+    enable = true;
+    baseIndex = 1;
+    escapeTime = 10;
+    historyLimit = 10000;
+    keyMode = "vi";
+    prefix = "C-a";
+    terminal = "xterm-256color";
+    extraConfig = tmuxConfig;
+    plugins = with pkgs.tmuxPlugins; [
+      sensible
+      yank
+      kanagawa
+      {
+        plugin = kanagawa;
+        extraConfig = ''
+          set -g @kanagawa-theme 'wave'
+          set -g @kanagawa-plugins "cpu-usage git"
+          set -g @kanagawa-show-powerline true
+          set -g @kanagawa-refresh-rate 10
+
+          set -g status-right " #(tms sessions)"
+          bind -r '(' switch-client -p\; refresh-client -S
+          bind -r ')' switch-client -n\; refresh-client -S
+        '';
+      }
+    ];
+  };
+}