feat: Add Milestone 3 documentation including feature testing plan, demo notes, and demo flow details

- Introduced comprehensive testing plan for Milestone 3 in m3-client-note.md
- Documented feedback and suggestions from demo sessions in m3-notes.md
- Created detailed demo flow for Milestone 3 in m3.md, outlining user interactions and expected outcomes
- Added planning tasks for Milestone 4 in m4-planning.md, covering backend and frontend development tasks, research, and business tasks

internal/launchpad/assets/diagrams/diagrams-config.json

@@ -60,43 +60,43 @@
     "icon": "bi-geo-alt"
   },
   {
-    "path": "assets/diagrams/dataconnect/uml/user_uml_diagram.mmd",
+    "path": "docs/DATACONNECT_GUIDES/DIAGRAMS/uml/user_uml_diagram.mmd",
     "title": "User UML Diagram Dataconnect",
     "type": "mermaid",
     "icon": "bi-diagram-2"
   },
   {
-    "path": "assets/diagrams/dataconnect/uml/staff_uml_diagram.mmd",
+    "path": "docs/DATACONNECT_GUIDES/DIAGRAMS/uml/staff_uml_diagram.mmd",
     "title": "Staff UML Diagram Dataconnect",
     "type": "mermaid",
     "icon": "bi-diagram-2"
   },
   {
-    "path": "assets/diagrams/dataconnect/uml/business_uml_diagram.mmd",
+    "path": "docs/DATACONNECT_GUIDES/DIAGRAMS/uml/business_uml_diagram.mmd",
     "title": "Business UML Diagram Dataconnect",
     "type": "mermaid",
     "icon": "bi-diagram-3"
   },
   {
-    "path": "assets/diagrams/dataconnect/uml/vendor_uml_diagram_simplify.mmd",
+    "path": "docs/DATACONNECT_GUIDES/DIAGRAMS/uml/vendor_uml_diagram_simplify.mmd",
     "title": "Vendor UML Diagram Dataconnect",
     "type": "mermaid",
     "icon": "bi-diagram-3"
   },
   {
-    "path": "assets/diagrams/dataconnect/uml/team_uml_diagram.mmd",
+    "path": "docs/DATACONNECT_GUIDES/DIAGRAMS/uml/team_uml_diagram.mmd",
     "title": "Team UML Diagram Dataconnect",
     "type": "mermaid",
     "icon": "bi-diagram-2"
   },
   {
-    "path": "assets/diagrams/dataconnect/mobile/client_app_diagram.mmd",
+    "path": "docs/DATACONNECT_GUIDES/DIAGRAMS/mobile/client_app_diagram.mmd",
     "title": "Client App Diagram Dataconnect",
     "type": "mermaid",
     "icon": "bi-diagram-2"
   },
   {
-    "path": "assets/diagrams/dataconnect/mobile/staff_app_diagram.mmd",
+    "path": "docs/DATACONNECT_GUIDES/DIAGRAMS/mobile/staff_app_diagram.mmd",
     "title": "Staff App Diagram Dataconnect",
     "type": "mermaid",
     "icon": "bi-diagram-2"