Move gh-pages to /docs folder

* Move gh-pages assets to /docs folder
* Move most of the /images to /docs/images
* Update references in package.json, README.md and walkthrough
* Keep logo-readme.png in /images to avoid breaking remote and what's new

Author: alefragnani

.vscodeignore

@@ -22,6 +22,6 @@ webpack.config.js
 AGENTS.md
 
 # gh-pages
-index.html
-styles.css
-images/project-manager-save-and-list.gif
+docs/index.html
+docs/styles.css
+docs/images/project-manager-save-and-list.gif