feat: add services page and API endpoints for service cost breakdown

- Implemented new API endpoints for fetching global services and service tenants details.
- Created a new services.html page with a sidebar for navigation and a chart for service costs.
- Updated frontend JavaScript to handle service data loading and rendering.
- Enhanced the dashboard with provider filtering options for AWS and Azure.
- Added a segmented toggle for selecting the date range for service costs.
- Improved styling for the sidebar and data tables.
- Refactored common utility functions for better reusability across pages.

.gitignore

@@ -8,4 +8,5 @@ config.json
 data/
 .env
 .DS_Store
-.claude/
+.claude/
+TODO.md