- Added `handleDeleteCharacter` method to handle character deletion with confirmation prompts.
- Updated `CharacterComponent` and `CharacterDetail` to include delete button and related logic.
- Localized new strings for character deletion (e.g., confirmation prompts, success/error messages).
- Enhanced database repository methods (`deleteCharacter`) to handle character deletion securely.
- Improved synchronization workflows to accommodate character deletion.
- Moved spell-related components to the `book/settings/spells` directory for better organization.
- Added "Spells" as a new tool in book settings and composer sidebar with localization support.
- Integrated spell-related UI elements (`SpellComponent`, `SpellList`, `SpellTagManager`) into settings and sidebars.
- Updated logic to handle enabling/disabling of the spells tool per book.
