change tmux config

modules/tmux/default.nix

@@ -3,7 +3,26 @@
   programs.tmux = {
     enable = true;
     extraConfig = ''
-      set -g mouse on
+      set -g default-terminal "tmux-256color"
+      set -ga terminal-overrides ",*256col*:Tc"
+      # enable vim like key bindings
+      set-window-option -g mode-keys vi
+      unbind [
+      bind Escape copy-mode
+      unbind p
+      bind p paste-buffer
+      bind-key -T copy-mode-vi v send-keys -X begin-selection
+      bind-key -T copy-mode-vi y send-keys -X copy-selection
+      bind-key -T copy-mode-vi r send-keys -X rectangle-toggle
+
+      # changing default delay
+      set -s escape-time 1
+
+      # window navigation with the meta key + vim keybinding
+      bind -n M-h select-pane -L
+      bind -n M-l select-pane -R
+      bind -n M-k select-pane -U
+      bind -n M-j select-pane -D
     '';
   };
 }