add kwm window manager (river+kwm), remove old river config

shell/.profile

@@ -38,7 +38,9 @@ export GOBIN=~/.local/bin
 
 # start X or Hyprland at login
 if [ -z "$DISPLAY" -a -z "$WAYLAND_DISPLAY" -a "$(tty)" = /dev/tty1 ]; then
-    if which /usr/bin/sx > /dev/null; then
+    if which river kwm stdout-clock > /dev/null; then
+        exec river -c 'stdout-clock | kwm'
+    elif which /usr/bin/sx > /dev/null; then
         exec /usr/bin/sx ~/.xsession
     elif which /usr/bin/startx > /dev/null; then
         exec /usr/bin/startx ~/.xsession