hyprland: add SUPER+arrow workspace cycling and overview binds

SUPER+Left/Right cycle existing workspaces on the active monitor
(m+1/m-1 with cycling enabled), SUPER+Up opens the hyprshell overview
scoped to the current monitor (create/manage workspaces there), and
SUPER+Down closes the overview again. Adds binds-help.sh cheat sheet
(SHIFT+SUPER+H) and overview-close.sh helper.

hyprshell/.config/hyprshell/config.ron

@@ -1,6 +1,6 @@
 // Edit with `hyprshell config edit`
 (
-    version: 3,
+    version: 4,
     windows: (
         scale: 8.5,
         items_per_row: 5,
@@ -69,11 +69,13 @@
                     ),
                 ),
             ),
-            key: "Tab",
-            modifier: "alt",
-            filter_by: [],
-            hide_filtered: false,
-            exclude_special_workspaces: "",
+            key: "Up",
+            top_offset: 430,
+            modifier: "super",
+            filter_by: [
+                current_monitor,
+            ],
+            exclude_workspaces: "special:.*",
         ),
         switch: (
             modifier: "alt",
@@ -82,7 +84,8 @@
                 current_monitor,
             ],
             switch_workspaces: false,
-            exclude_special_workspaces: "",
+            exclude_workspaces: "",
+            kill_key: 'q',
         ),
         switch_2: None,
     ),