chore: update dotfiles so i3 qt themes actually work

.config/i3/config

@@ -29,6 +29,10 @@ exec_always --no-startup-id picom -b --config $HOME/.config/picom/picom.conf
 # screen before suspend. Use loginctl lock-session to lock your screen.
 exec --no-startup-id xss-lock --transfer-sleep-lock -- i3lock --nofork
 
+
+# Source i3 env variables
+exec_always --no-startup-id source $HOME/.config/i3/env
+
 # NetworkManager is the most popular way to manage wireless networks on Linux,
 # and nm-applet is a desktop environment-independent system tray GUI for it.
 exec --no-startup-id nm-applet

.xsessionrc

@@ -1,5 +0,0 @@
-#!/bin/bash
-
-if [[ "$DESKTOP_SESSION" == "i3" ]]; then
-	export QT_QPA_PLATFORMTHEME="qt5ct"
-fi