This commit adds new functionality for tracking user activities within the application, including:
- Implementation of a new activity service to fetch and manage group activities.
- Creation of a dedicated activity store to handle state management for activities.
- Introduction of new API endpoints for retrieving paginated activity data.
- Enhancements to the UI with new components for displaying activity feeds and items.
- Refactoring of existing components to utilize the new activity features, improving user engagement and interaction.
These changes aim to enhance the application's activity tracking capabilities and provide users with a comprehensive view of their interactions.
- Added support for recurring expenses, allowing users to define recurrence patterns (daily, weekly, monthly, yearly) for expenses.
- Introduced `RecurrencePattern` model to manage recurrence details and linked it to the `Expense` model.
- Implemented background job scheduling using APScheduler to automatically generate new expenses based on defined patterns.
- Updated expense creation logic to handle recurring expenses, including validation and database interactions.
- Enhanced frontend components to allow users to create and manage recurring expenses through forms and lists.
- Updated documentation to reflect new features and usage guidelines for recurring expenses.
