chore(docs): add updated architecture diagrams and update .gitignore

- Added updated diagram images with improved borders and shadows
- Removed docs/ from .gitignore to ensure documentation and assets are tracked

Author: dulanjayabhanu

.gitignore

@@ -57,5 +57,4 @@ bower_components/
 # GitHub Pages artifacts
 # (in case you build locally before deploy)
 # -----------------------------
-_site/
-docs/
+_site/