Add window title to waybar.

ansible/roles/waybar/files/waybar_config.json

@@ -1,6 +1,6 @@
 {
   // "height": 10, // Waybar height (to be removed for auto height)
-  "modules-left": ["sway/workspaces", "sway/mode"],
+  "modules-left": ["sway/workspaces", "sway/window", "sway/mode"],
   "modules-right": ["custom/night_mode", "custom/temperature", "custom/sound", "custom/available_memory", "custom/battery", "idle_inhibitor", "custom/clock", "tray"],
   "sway/workspaces": {
     "disable-scroll": true
@@ -8,6 +8,9 @@
   "sway/mode": {
     "format": "<span style=\"italic\">{}</span>"
   },
+  "sway/window": {
+    "format": "{title}"
+  },
   "idle_inhibitor": {
     "format": "{icon}",
     "format-icons": {