Rebrand application from 'Beach Litter Mapping Platform' to 'Litter Scouts'

- Updated app name in all source files, documentation, and configuration
- Changed package names in package.json files
- Updated header, titles, and user-facing text
- Modified email templates and notification text
- Updated steering rules and spec documents

src/utils/index.ts

@@ -1,4 +1,4 @@
-// Utility functions for the Beach Litter Mapping Platform
+// Utility functions for Litter Scouts
 
 // Re-export coordinate utilities
 export * from './coordinates';