feat: Add About and Favourites pages, update routing and context management

- Added new routes for About and Favourites pages.
- Implemented About page with version information and credits.
- Created Favourites page with a placeholder message for empty favourites.
- Refactored RegionConfig import paths for consistency.
- Introduced PageTitleContext to manage page titles dynamically.
- Updated various components to utilize the new context for setting page titles.
- Enhanced AppShell layout with a responsive Drawer for navigation.
- Added CSS styles for new components and pages.
- Integrated commit hash display in the About page for version tracking.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/frontend/app/routes.tsx b/src/frontend/app/routes.tsx
index 1316b5e..60671cd 100644
--- a/src/frontend/app/routes.tsx
+++ b/src/frontend/app/routes.tsx
@@ -8,4 +8,6 @@ export default [
   route("/estimates/:id", "routes/estimates-$id.tsx"),
   route("/timetable/:id", "routes/timetable-$id.tsx"),
   route("/settings", "routes/settings.tsx"),
+  route("/about", "routes/about.tsx"),
+  route("/favourites", "routes/favourites.tsx"),
 ] satisfies RouteConfig;