Remove unused components and models for improved maintainability

- Deleted redundant components (`AddActionButton`, `AlertBox`, `AlertStack`, `BackButton`, `CancelButton`, and `CollapsableArea`) and related files.
- Removed unused models (`Book`, `BookSerie`, `BookTables`, `Character`, and `Chapter`) to reduce codebase clutter.
- Updated project structure and references to reflect these removals.

components/form/RadioGroup.tsx

@@ -36,10 +36,10 @@ export default function RadioGroup(
                     />
                     <label
                         htmlFor={`${name}-${option.value}`}
-                        className={`px-4 py-2 rounded-lg cursor-pointer transition-all duration-200 text-sm font-medium border ${
+                        className={`px-4 py-2 rounded-lg cursor-pointer transition-colors duration-150 text-sm font-medium border ${
                             value === option.value
-                                ? 'bg-primary/20 text-primary border-primary/40 shadow-md'
-                                : 'bg-secondary/30 text-text-primary border-secondary/50 hover:bg-secondary hover:border-secondary hover:scale-105'
+                                ? 'bg-secondary text-primary border-primary'
+                                : 'bg-secondary text-text-secondary border-secondary hover:text-text-primary'
                         }`}
                     >
                         {option.label}