chore: Update Docusaurus deployment workflow and documentation structure

- Added a step to copy screenshots to the static directory during deployment.
- Updated .gitignore to keep the README file in the screenshots directory.
- Added a new README file in the screenshots directory to explain its purpose and usage.
- Introduced a new npm script to prepare screenshots for the documentation site.

.github/workflows/docusaurus-deploy.yml

@@ -39,6 +39,9 @@ jobs:
       - name: Install dependencies
         run: npm ci
       
+      - name: Copy screenshots to static directory
+        run: npm run prepare-screenshots
+      
       - name: Build
         run: npm run build