ui: monaco: upgrade to 0.57, drop monaco-editor-webpack-plugin

- Migrate entry points to the 0.57 exports scheme (monaco-editor/editor,
  languages/features/typescript/register)
- Wire workers via the official MonacoEnvironment.getWorker +
  new Worker(new URL(...)) integration; webpack emits them as shared-chunk
  classic workers (chrome 70 compatible), total assets -21%
- Keep css/html/json language features (register.all) and route their
  worker labels; json is used by the cmeditor textareas
- Replace removed esm/vs/nls.messages with an inline implementation in the
  nls shim
- Drop MinChunkSizePlugin: it merged worker chunks into the main chunk and
  broke the runtime id module (webpack#15416)
- Remove monaco-editor-webpack-plugin dependency
- loadMonaco() now returns the loaded feature module exports, e.g.
  loadMonaco(['typescript']).typescript.javascriptDefaults

packages/ui-default/package.json

@@ -71,9 +71,8 @@
     "md-editor-rt": "^7.1.0",
     "mini-css-extract-plugin": "^2.10.2",
     "moment": "^2.31.0",
-    "monaco-editor": "0.52.2",
+    "monaco-editor": "0.57.0",
     "monaco-editor-nls": "^3.1.0",
-    "monaco-editor-webpack-plugin": "^7.1.1",
     "monaco-themes": "0.4.7",
     "monaco-yaml": "5.4.1",
     "nanoid": "^6.0.1",