Add device commands to Devices view context menu, nest device info

[chrisdp]

What this does

• Right-clicking a device in the Devices view now shows every device command (set active, capture screenshot, switch TV input, refresh, restart, check for software updates, open web portal, view registry, set/change/clear password, add/edit settings). VS Code doesn't render codicons in tree context menus, so the menu entries use the same emoji as the tree action items. The menu-only commands are hidden from the command palette.
• Device rows now carry a capability-token contextValue (e.g. device-notInUser-inWorkspace-noPassword-isTv-canViewRegistry-canRestart) so the menu when clauses can honor the same conditions the tree items use (firmware version, serial number, TV, stored password, configured-in scope).
• The device info fields are nested under an expandable Device Info group instead of sitting alongside the action items. Click-to-copy and the conceal-device-info setting still work the same.
• Fixes "Set as Active Device" and "Refresh Device" never appearing in the context menu for auto-discovered devices (the old /^device-/ when clause didn't match the plain device contextValue).