LoboWerewolf Hub - v5.0.0

Changes in 5.0.0:

Sheet Dock - every LoboWerewolf module used to add its own button to the actor sheet
header. Now the Hub owns a single button (paw icon) that opens a tray with the actions of
all installed modules, grouped by category.

• New hub.sheetDock API: register, unregister, getEntries and open.
• Entries carry an optional per-actor visible() filter and a badge() counter; the
  button only appears when the actor has something to show.
• Groups follow the LoboWerewolf site categories, ordered by order (default 100).
• Works on both v1 and v2 actor sheets.