Show clipboard picker's own shortcuts (search/delete/copy/open) in Super+K keybindings menu

[silversword411]

The clipboard picker (omarchy menu clipboard) has several shortcuts that aren't discoverable anywhere:

• type to filter/search
• Delete — remove selected entry
• Shift+Delete — clear all history
• Enter — paste
• Shift+Enter — copy without pasting
• Alt+Enter — open entry

These are handled entirely inside the Quickshell plugin's own key handler (Clipboard.qml), not registered as Hyprland binds, so they never show up in hyprctl binds and can't appear in the Super+K keybindings cheatsheet (omarchy-menu-keybindings), which only reads Hyprland binds plus a small hardcoded static_bindings() list.

Would be nice to either: (a) add these to that hardcoded list, or (b) show a small shortcuts footer/hint inside the clipboard picker UI itself. Omarchy 4.0.1-1.