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.

static/js/navigation.js

@@ -0,0 +1,53 @@
+// Navigation chevron buttons logic
+document.addEventListener("DOMContentLoaded", function () {
+  const navPrev = document.getElementById("nav-prev");
+  const navNext = document.getElementById("nav-next");
+
+  if (!navPrev || !navNext) return;
+
+  // Define the navigation order (main pages)
+  const navPages = [
+    "/",
+    "/projects/ui",
+    "/imports/ui",
+    "/ui/simulations",
+    "/ui/reporting",
+    "/ui/settings",
+  ];
+
+  const currentPath = window.location.pathname;
+
+  // Find current index
+  let currentIndex = -1;
+  for (let i = 0; i < navPages.length; i++) {
+    if (currentPath.startsWith(navPages[i])) {
+      currentIndex = i;
+      break;
+    }
+  }
+
+  // If not found, disable both
+  if (currentIndex === -1) {
+    navPrev.disabled = true;
+    navNext.disabled = true;
+    return;
+  }
+
+  // Set up prev button
+  if (currentIndex > 0) {
+    navPrev.addEventListener("click", function () {
+      window.location.href = navPages[currentIndex - 1];
+    });
+  } else {
+    navPrev.disabled = true;
+  }
+
+  // Set up next button
+  if (currentIndex < navPages.length - 1) {
+    navNext.addEventListener("click", function () {
+      window.location.href = navPages[currentIndex + 1];
+    });
+  } else {
+    navNext.disabled = true;
+  }
+});