added vim-tmux-navigator plugin config

https://github.com/christoomey/vim-tmux-navigator

.tmux.conf

@@ -6,11 +6,15 @@ bind-key C-a last-window
 set-window-option -g mode-keys vi
 set -s escape-time 0
 
-bind -n C-h if "[ $(tmux display -p '#{pane_current_command}') = vim ]" "send-keys C-h" "select-pane -L"
-bind -n C-j if "[ $(tmux display -p '#{pane_current_command}') = vim ]" "send-keys C-j" "select-pane -D"
-bind -n C-k if "[ $(tmux display -p '#{pane_current_command}') = vim ]" "send-keys C-k" "select-pane -U"
-bind -n C-l if "[ $(tmux display -p '#{pane_current_command}') = vim ]" "send-keys C-l" "select-pane -R"
-
+# Smart pane switching with awareness of Vim splits.
+# See: https://github.com/christoomey/vim-tmux-navigator
+is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
+    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
+bind-key -n C-h if-shell "$is_vim" "send-keys C-h"  "select-pane -L"
+bind-key -n C-j if-shell "$is_vim" "send-keys C-j"  "select-pane -D"
+bind-key -n C-k if-shell "$is_vim" "send-keys C-k"  "select-pane -U"
+bind-key -n C-l if-shell "$is_vim" "send-keys C-l"  "select-pane -R"
+bind-key -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"
 bind-key -T copy-mode-vi C-h select-pane -L
 bind-key -T copy-mode-vi C-j select-pane -D
 bind-key -T copy-mode-vi C-k select-pane -U