ATL-240: Fixed the VS Code extensions in the app.

Signed-off-by: Akos Kitta <kittaakos@typefox.io>

electron/build/scripts/arduino-pro-ide-electron-main.js

@@ -0,0 +1,9 @@
+const os = require('os');
+const path = require('path');
+// Enables the discovery of the VS Code extensions in the embedded `plugins` folder in the final app.
+process.env.THEIA_DEFAULT_PLUGINS = `local-dir:${path.resolve(__dirname, '..', 'plugins')}`;
+process.env.THEIA_PLUGINS = [
+    process.env.THEIA_PLUGINS,
+    `local-dir:${path.resolve(os.homedir(), '.arduinoProIDE', 'plugins')}`
+].filter(Boolean).join(',');
+require('../src-gen/frontend/electron-main.js');

electron/build/template-package.json

@@ -1,5 +1,5 @@
 {
-  "main": "src-gen/frontend/electron-main.js",
+  "main": "scripts/arduino-pro-ide-electron-main.js",
   "author": "Arduino SA",
   "resolutions": {
     "**/fs-extra": "^4.0.3"
@@ -54,6 +54,7 @@
     "files": [
       "src-gen",
       "lib",
+      "scripts",
       "!node_modules/**/*.{ts,map}",
       "!node_modules/**/*.spec.js",
       "!node_modules/@theia/**/test/*",