feat(editor): F4.4b the design tools: palette, moving, cables, menus, undo

The palette in Java's order with Java's icons and names: a device dragged
onto the surface lands with its icon at the drop point, a tapped one in the
middle of the view; a new router asks for 2 to 8 interfaces as Java does.
A tap selects, a drag moves (divided by the scale), a long press or the
three-dot button opens Java's menu. The cable tool plugs by a drag or by
two taps, shows WAN or LAN on a home router's halves and Java's messages
when refused. Delete removes the selection; undo and redo by button and
Ctrl+Z/Ctrl+Y, each editor with its own origin. Browser tests with mouse
and touch.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/editor/src/i18n/en.json

@@ -1,5 +1,24 @@
 {
+  "cable.alreadyConnected": "Components already connected",
+  "cable.lan": "LAN port (internal)",
+  "cable.lanOccupied": "LAN port (internal) already occupied!",
+  "cable.noFreePort": "No connector available",
+  "cable.portTaken": "This port is already taken.",
+  "cable.sameDevice": "A device cannot be connected to itself.",
+  "cable.unknownDevice": "This device no longer exists.",
+  "cable.unknownPort": "There is no such port.",
+  "cable.wan": "WAN port (external)",
+  "cable.wanOccupied": "WAN port (external) already occupied!",
+  "cable.wirelessNotPossible": "Wireless connection not possible",
   "canvas.label": "Network",
+  "design.actions": "Actions",
+  "design.palette": "Components",
+  "design.redo": "Redo",
+  "design.undo": "Undo",
+  "dev.example": "Example",
+  "dev.newProject": "New project",
+  "dev.openFile": "Open file …",
+  "dev.title": "Filius editor (development)",
   "device.cable": "Connection",
   "device.gateway": "Home Router",
   "device.networkSwitch": "Switch / Wi-Fi",
@@ -8,9 +27,12 @@
   "device.remoteLink": "Modem",
   "device.router": "Router",
   "device.unsupported": "Unknown device",
-  "dev.example": "Example",
-  "dev.openFile": "Open file …",
-  "dev.title": "Filius editor (development)",
+  "menu.delete": "Delete",
+  "menu.removeAllCables": "Remove all cables",
+  "menu.removeCable": "Remove cable",
+  "router.cancel": "Cancel",
+  "router.prompt": "Choose number of NIC of the router!",
+  "router.title": "Number of NIC",
   "zoom.fit": "Show all",
   "zoom.in": "Zoom in",
   "zoom.level": "{percent} %",