add vi mode

.config/tmux/tmux.conf

@@ -1,5 +1,8 @@
 #CONFIGURATION
-set-option -g allow-rename off # dont rename windows on command execution
+set-option -g prefix C-a # rebind tmux prefix to CTRL + a because vim uses default CTRL + b
+bind-key C-a last-window # double-press of CTRL + a (tmux prefix) switches to previous window
+set-window-option -g mode-keys vi # vi mode
+set-option -g allow-rename off # dont rename windows on command execution TODO fix
 set -s escape-time 0 # dont delay escape key in vim
 set -g base-index 1           # start windows numbering at 1