add better tmux and nvim navigation

.config/tmux/tmux.conf

@@ -16,19 +16,27 @@ bind-key -T copy-mode-vi v send-keys -X begin-selection
 bind-key -T copy-mode-vi C-v send-keys -X rectangle-toggle
 bind-key -T copy-mode-vi y send-keys -X copy-selection-and-cancel
 
+# 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|l?n?vim?x?|fzf)(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 "$is_vim" 'send-keys C-l'  'select-pane -R'
+tmux_version='$(tmux -V | sed -En "s/^tmux ([0-9]+(.[0-9]+)?).*/\1/p")'
+if-shell -b '[ "$(echo "$tmux_version < 3.0" | bc)" = 1 ]' \
+    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
+if-shell -b '[ "$(echo "$tmux_version >= 3.0" | bc)" = 1 ]' \
+    "bind-key -n 'C-\\' if-shell \"$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
+bind-key -T copy-mode-vi 'C-l' select-pane -R
+bind-key -T copy-mode-vi 'C-\' select-pane -l
 
-# VIM like pane moving
-bind h select-pane -L
-bind j select-pane -D
-bind k select-pane -U
-bind l select-pane -R
 
-# Remap arrow keys (normally pane switch) to be resize,
-# which will now be double-mapped with ctrl+arrow
-bind -r Up resize-pane -U
-bind -r Down resize-pane -D
-bind -r Left resize-pane -L
-bind -r Right resize-pane -R
 
 set -g renumber-windows on
 set-option -g allow-rename off