Update niri settings for keybindings

niri/cfg/workspaces.kdl

@@ -1,2 +1,18 @@
-workspace "browser"
-workspace "chat" 
+workspace "1" {
+    open-on-output "DP-1"
+}
+workspace "2" {
+    open-on-output "DP-1"
+}
+workspace "3" {
+    open-on-output "DP-1"
+}
+workspace "4" {
+    open-on-output "DP-1"
+}
+workspace "5" {
+    open-on-output "DP-1"
+}
+workspace "6" {
+    open-on-output "HDMI-A-1"
+}