Migrate build from Webpack to Vite

[AlexeyMz]

• Remove all Webpack-related dev-dependencies;
• Add dev-dependency on vite and vite-plugin-css-injected-by-js;
• Move Vitest config into main Vite configuration;
• Use separate tsconfig.node.json for build scripts (e.g. Vite and Vitest configuration);
• Set "type": "module" in package.json;
• Enable "isolatedModules": true in tsconfig, fix missing type for re-exported types;
• Change examples to have separate HTML for each entry point with shared code for settings;

TODO:

• Check built library with Reactodia docs

[AlexeyMz]

Measured LoC stats with cloc:

-------------------------------------------------------------------------------
Language                     files          blank        comment           code
-------------------------------------------------------------------------------
TypeScript                     168           4343           8244          32397
JSON                            10              2              0           8740
SCSS                            59            717             36           3664
Markdown                         6            202              0           1188
SVG                             28              4              4            822
HTML                            10              0              0            141
JavaScript                       1              1              0             91
CSS                              3              9              0             57
YAML                             1              9              0             57
INI                              1              7              0             21
-------------------------------------------------------------------------------
SUM:                           287           5294           8284          47178
-------------------------------------------------------------------------------

Measured bundle sizes:
before

 179450 layout.worker.js
 456558 layout.worker.js.map
 444435 layout-sync.js
 492067 layout-sync.js.map
  18280 legacy-styles.js
  14262 legacy-styles.js.map
1661623 workspace.js
2896599 workspace.js.map

after

   1216 layout.worker.js
   2661 layout.worker.js.map
 162309 layout-sync.js
 578325 layout-sync.js.map
  11962 legacy-styles.js
  18112 legacy-styles.js.map
1026658 workspace.js
2024975 workspace.js.map

Some observations:

• Build time on GitHub Actions now is ~30% (reduction by 70%) from the Webpack build.
• Main bundle size (workspace.js) is ~62% (reduction by 38%) from the Webpack build.
  • When considering the library build only (without the examples), the difference even greater: 3s (vite) vs 15s (webpack), an 80% reduction!
• layout.worker bundle no longer includes layout-sync inside itself and instead imports it as ES module, so the code is no longer duplicated when using both in the dependent app.