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

.dockerignore

@@ -0,0 +1,25 @@
+node_modules
+dist
+.git
+.gitignore
+*.md
+.env
+.env.local
+.env.*.local
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.DS_Store
+coverage
+.vscode
+.idea
+*.swp
+*.swo
+*~
+.kiro
+uploads/*
+!uploads/.gitkeep
+server/node_modules
+server/dist
+server/uploads/*
+!server/uploads/.gitkeep