feat(frontend): add Projects, Agents, and Settings pages for enhanced project management

- Added routing and localization for "Projects" and "Agents" in `Header.tsx`.
- Introduced `ProjectAgentsPage` to manage and display agent details per project.
- Added `ProjectActivityPage` for real-time event tracking and approval workflows.
- Implemented `ProjectSettingsPage` for project configuration, including autonomy levels and repository integration.
- Updated language files (`en.json`, `it.json`) with new translations for "Projects" and "Agents".

frontend/messages/en.json

@@ -32,7 +32,9 @@
     "demos": "Demos",
     "design": "Design System",
     "admin": "Admin",
-    "adminPanel": "Admin Panel"
+    "adminPanel": "Admin Panel",
+    "projects": "Projects",
+    "agents": "Agents"
   },
   "auth": {
     "login": {

frontend/messages/it.json

@@ -32,7 +32,9 @@
     "demos": "Demo",
     "design": "Design System",
     "admin": "Admin",
-    "adminPanel": "Pannello Admin"
+    "adminPanel": "Pannello Admin",
+    "projects": "Progetti",
+    "agents": "Agenti"
   },
   "auth": {
     "login": {