chore(tmux): fix terminal-features and tidy config

Correct the terminal-feature typo to terminal-features, add kitty extkeys, and remove now-redundant comments.

config/tmux/tmux.conf

@@ -1,8 +1,9 @@
 # set-option -g default-terminal 'screen-256color'
 # set-option -g terminal-overrides ',xterm-256color:RGB'
 set -g default-terminal "tmux-256color"
-set -as terminal-feature ",*:RGB"
-set -as terminal-feature ",*:clipboard"
+set -ag terminal-overrides ",*:RGB"
+set -as terminal-features ",*:clipboard"
+set -ag terminal-features "xterm-kitty:extkeys"
 
 # set -ag terminal-overrides ",*:Tc"
 # set -as terminal-overrides ',*:Smulx=\E[4::%p1%dm'
@@ -10,30 +11,23 @@ set -as terminal-feature ",*:clipboard"
 # allow terminal scrolling
 # set -g terminal-overrides 'xterm*:smcup@:rmcup@'
 
-# Force tmux to use the static symlink path globally
 setenv -g SSH_AUTH_SOCK "$HOME/.ssh/ssh_auth_sock"
 set -g update-environment "DISPLAY XAUTHORITY"
 
 set -g mouse on
 
-# auto rename windows
 # set -g automatic-rename on
 # set -g automatic-rename-format '#{pane_current_command} #{b:pane_current_path}'
 set -g allow-rename on
 
-# start with window 1 (instead of 0)
 set -g base-index 1
-
-# start with pane 1
 setw -g pane-base-index 1
 
-# history
 set -g history-limit 5000
 
 set -g display-time 4000
 set -g status-interval 5
 
-# loud or quiet?
 set -g visual-activity off
 set -g visual-bell off
 set -g visual-silence off
@@ -41,8 +35,6 @@ set -g monitor-activity on
 set -g bell-action none
 set -g allow-passthrough on
 
-#set -g bell-on-alert on
-
 set -s escape-time 0
 setw -g aggressive-resize on
 set -g status-keys vi
@@ -50,7 +42,7 @@ set-window-option -g mode-keys vi
 
 set -g extended-keys on
 set -g extended-keys-format csi-u
-set-option -g focus-events on # TODO: learn how this works
+set-option -g focus-events on
 set-option -g set-titles on
 set-option -g detach-on-destroy off
 set-option -g renumber-windows on