feat(binds): open strata as the file manager

Super+Alt+Ctrl+F launches strata through vicinae, and strata windows get
the floating half-width rule Nautilus had.

exact_config.d/30-window-rules.kdl

@@ -64,6 +64,7 @@ window-rule {
 }
 
 window-rule {
+    match app-id="io.github.lgse.Strata"
     match app-id="org.gnome.Nautilus"
     match app-id="com.gabm.satty"
     open-floating true