Deleted CloudflareMailer class and its implementation from the mailers package. Updated dependencies across various packages, converting certain imports to use `type` only, and bumped versions for packages like `react-query`, `lucide-react`, and others.
This commit updates diverse packages such as "@makerkit/data-loader-supabase-core" and "@makerkit/data-loader-supabase-nextjs" to the new versions in the package.json files. Also, several refactorings were done in logging within services and loaders by progressing 'server-only' imports and improving context handling. Additionally, type annotations have been added to several exported functions for better code readability and maintainability.
