feat: F4.6f3 the file explorer and the image viewer

Oracle FileExplorerWindowRun uses Java's explorer and viewer windows as a
person does (the right-click menu, Java's questions answered, the import
window, the viewer's open). Both windows work on the document's files
through the core's operations: the tree of folders and files, the chosen
folder's entries, Java's menu (also as buttons, no right click needed),
copy that stays and cut that goes once pasted, the import; the viewer's
picture and title. Not taken from Java: a file chosen in the tree taken
for a folder, pictures laid over each other, a text file as an empty
picture. writeFiles numbers the entries in the file system's order again
when a rename made a new key.

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

packages/editor/test/i18n.test.ts

@@ -23,6 +23,28 @@ function properties(file: string): Map<string, string> {
 /** The editor's keys whose words are Java's, and the key of each in Java's bundle. */
 const FROM_JAVA: Readonly<Record<string, string>> = {
   'device.pc': 'hw_rechner_msg1',
+  'explorer.newFolder': 'fileexplorer_msg3',
+  'explorer.delete': 'fileexplorer_msg4',
+  'explorer.cut': 'fileexplorer_msg5',
+  'explorer.copy': 'fileexplorer_msg6',
+  'explorer.paste': 'fileexplorer_msg7',
+  'explorer.rename': 'fileexplorer_msg8',
+  'explorer.newName': 'fileexplorer_msg9',
+  'explorer.file': 'fileexplorer_msg10',
+  'explorer.folder': 'fileexplorer_msg11',
+  'explorer.import': 'fileexplorer_msg2',
+  'explorer.importTitle': 'fileexplorer_msg12',
+  'explorer.localFile': 'fileexplorer_msg13',
+  'explorer.chooseFile': 'fileexplorer_msg14',
+  'explorer.importButton': 'fileexplorer_msg15',
+  'explorer.importMissing': 'fileexplorer_msg16',
+  'explorer.sure': 'fileexplorer_msg18',
+  'explorer.invalidTarget': 'fileexplorer_msg19',
+  'explorer.close': 'sw_fileimporter_msg3',
+  'explorer.imported': 'sw_fileexplorer_msg2',
+  'explorer.notImported': 'sw_fileexplorer_msg1',
+  'explorer.tooLarge': 'sw_fileexplorer_msg3',
+  'viewer.open': 'imageviewer_msg2',
   'textEditor.new': 'texteditor_msg3',
   'textEditor.open': 'texteditor_msg4',
   'textEditor.save': 'texteditor_msg5',