CI: Update node, add lockfile, pin tools (DevExpress#8065)

Author: alexslavr

.github/workflows/nodejs.yml

@@ -3,7 +3,7 @@ name: Node.js CI
 on: [push, pull_request]
 
 env:
-  nodeVersion: 14.x
+  nodeVersion: 20.x
   dotNetVersion: 6.0.x
 
 jobs:

.gitignore

@@ -1,4 +1,3 @@
-package-lock.json
 node_modules/
 artifacts/
 link-transformer-resolved-links.md
@@ -9,4 +8,5 @@ JS-Howto.xml
 JS-ApiReference-Compact.json
 JS-Howto-Compact.json
 .DS_Store
-.vscode
+.vscode
+.idea