Added new diagrams with source & sidebar footer (#2751)

* Added new diagrams with source & sidebar footer

Signed-off-by: Denislav Prinov <denislav.prinov@bosch.com>

* Fix REST API documentation path

Signed-off-by: Denislav Prinov <denislav.prinov@bosch.com>

---------

Signed-off-by: Denislav Prinov <denislav.prinov@bosch.com>

docs/_sidebar.md

@@ -41,6 +41,13 @@
 
 <hr class="sidebar-sep" />
 
+- [Privacy Policy](http://www.eclipse.org/legal/privacy.php)
+- [Terms of Use](http://www.eclipse.org/legal/termsofuse.php)
+- [Copyright Agent](http://www.eclipse.org/legal/copyright.php)
+- [Legal](http://www.eclipse.org/legal)
+- [License](https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt)
+- **© 2025 The Eclipse hawkBit Project**
+
 <p align="center">
   <img src="images/eclipse_foundation_logo.png" alt="eclipse foundation logo" width="180">
-</p>
+</p>