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/reports/scenario_distribution.html

@@ -2,7 +2,7 @@
 {% block title %}Scenario Distribution | CalMiner{% endblock %}
 
 {% block content %}
-  {% include "partials/reports_header.html" with context %}
+  {% include "partials/reports_header.html" %}
 
   <section class="report-overview">
     <div class="report-grid">