feat: F4.6f2 the text editor on the document's Y.Text, files both ways while the simulation runs

Oracle TextEditorWindowRun uses Java's text editor window and its file
dialog as a person does. The open file's text is its Y.Text in the
document (plan 7.3): typed is in the file at once, for everyone and for
the running engine. Core openText/saveTextAs without Java's mistakes
(lost saves after save-as onto a file or a removed file, files named
'ordner/d.txt' or ''); doc files.ts (changeFiles, fileText, nodeFiles,
readFilesInto); the room takes a person's files into the engine at once
and writes the engine's files back at the tick they changed; the editor's
window, Java's dialog, the text area following others' changes with the
caret in place, its own undo.

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

packages/editor/src/i18n/en.json

@@ -122,6 +122,15 @@
   "emailServer.username": "User:",
   "emailServer.whiteSpace": "User names may not contain whitespace!",
   "emailServer.yes": "Yes",
+  "fileDialog.cancel": "Cancel",
+  "fileDialog.entries": "Contents of the folder",
+  "fileDialog.folder": "Folder:",
+  "fileDialog.name": "File:",
+  "fileDialog.open": "Open",
+  "fileDialog.openTitle": "Open file",
+  "fileDialog.save": "Save",
+  "fileDialog.saveTitle": "Save file",
+  "fileDialog.up": "Folder up",
   "firewall.accept": "accept",
   "firewall.action": "Action",
   "firewall.active": "Activate firewall",
@@ -257,6 +266,19 @@
   "terminal.interrupt": "Stop the command (Ctrl+C)",
   "terminal.next": "Next command",
   "terminal.previous": "Previous command",
+  "textEditor.folderMissing": "There is no folder for “{name}”.",
+  "textEditor.gone": "The file “{name}” was deleted. The text is still here; “Save” stores it as a new file.",
+  "textEditor.invalidName": "“{name}” is not a valid file name.",
+  "textEditor.isFolder": "“{name}” is a folder.",
+  "textEditor.new": "New",
+  "textEditor.noName": "Enter a file name.",
+  "textEditor.notFound": "There is no file “{name}”.",
+  "textEditor.notText": "“{name}” is not a text file.",
+  "textEditor.open": "Open",
+  "textEditor.save": "Save",
+  "textEditor.saveAs": "Save as",
+  "textEditor.savedLive": "What you type is in the file at once.",
+  "textEditor.text": "Text",
   "webServer.folder": "Subdirectory",
   "webServer.hostName": "Hostname",
   "webServer.useVirtualHosts": "Enable virtual hosts",