update to use i3 instead of openbox

i3.config

@@ -0,0 +1,29 @@
+set $mod Mod1
+
+# Terminal
+bindsym $mod+Return exec xterm
+
+# Restart i3 inplace (preserves layout/session)
+bindsym $mod+Shift+r restart
+
+# Workspace switching (workspaces 1 to 4)
+bindsym $mod+1 workspace 1
+bindsym $mod+2 workspace 2
+bindsym $mod+3 workspace 3
+
+# Move focused container to workspace
+bindsym $mod+Shift+1 move container to workspace 1
+bindsym $mod+Shift+2 move container to workspace 2
+bindsym $mod+Shift+3 move container to workspace 3
+
+focus_follows_mouse no
+
+# Set default layout tabbed
+workspace_layout tabbed
+
+exec /entrypoint.sh
+
+bar {
+    position top
+    status_command i3status
+}