feat(editor): F4.6b the command line on a computer's desktop

A new oracle, TerminalWindowRun, types into Java's own command line
window: the window writes each line after its prompt, takes a blank
line, cls, reset and exit itself, keeps the lines for the arrow keys,
and keeps its text, history and working directory over a stop and a
start.

The room now holds a command line window per computer for everyone
(TerminalWindow), kept over stops; the protocol carries its lines and
the one way to read them (terminalScreen); the core goes on in the
working directory of the run before (continueIn). The desktop opens
programs in Java's frame, and the command line works with keyboard and
finger: grey on black, the prompt hidden while a command runs, history,
chips for the commands, Ctrl+C. The room's failure is now tested in the
browser.

Fixed: the room handed the engine the wall clock with fractions of a
millisecond, and a ping hung after its first timeout. The engine and
the room count whole milliseconds, as Java's clock does.

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

packages/editor/src/i18n/de.json

@@ -154,6 +154,12 @@
   "sheet.title": "Einstellungen",
   "sheet.wireless": "Drahtlos (WLAN)",
   "sim.failed": "Die Simulation ist auf einen Fehler gestoßen und wurde beendet.",
+  "terminal.commands": "Befehle",
+  "terminal.ctrlC": "Strg+C",
+  "terminal.input": "Befehl eingeben",
+  "terminal.interrupt": "Befehl abbrechen (Strg+C)",
+  "terminal.next": "Nächster Befehl",
+  "terminal.previous": "Vorheriger Befehl",
   "zoom.fit": "Alles zeigen",
   "zoom.in": "Vergrößern",
   "zoom.level": "{percent} %",