feat: Enhance project and scenario creation with monitoring metrics

- Added monitoring metrics for project creation success and error handling in `ProjectRepository`.
- Implemented similar monitoring for scenario creation in `ScenarioRepository`.
- Refactored `run_monte_carlo` function in `simulation.py` to include timing and success/error metrics.
- Introduced new CSS styles for headers, alerts, and navigation buttons in `main.css` and `projects.css`.
- Created a new JavaScript file for navigation logic to handle chevron buttons.
- Updated HTML templates to include new navigation buttons and improved styling for buttons.
- Added tests for reporting service and routes to ensure proper functionality and access control.
- Removed unused imports and optimized existing test files for better clarity and performance.

templates/base.html

@@ -25,6 +25,7 @@
   <script src="/static/js/exports.js" defer></script>
   <script src="/static/js/imports.js" defer></script>
   <script src="/static/js/notifications.js" defer></script>
+  <script src="/static/js/navigation.js" defer></script>
     <script src="/static/js/theme.js"></script>
   </body>
 </html>