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/CheckBox.tsx

@@ -1,4 +1,4 @@
-import {Dispatch, SetStateAction} from "react";
+import React, {Dispatch, SetStateAction} from "react";
 
 interface CheckBoxProps {
     isChecked: boolean;
@@ -27,15 +27,15 @@ export default function CheckBox(
                     className="hidden"
                 />
                 <label htmlFor={id}
-                       className={`block overflow-hidden h-6 rounded-full cursor-pointer transition-all duration-200 border-2 shadow-sm hover:shadow-md ${
+                       className={`block overflow-hidden h-6 rounded-full cursor-pointer transition-colors duration-150 border-2 ${
                            isChecked
-                               ? 'bg-primary border-primary shadow-primary/30'
-                               : 'bg-secondary/50 border-secondary hover:bg-secondary'
+                               ? 'bg-primary border-primary'
+                               : 'bg-secondary border-secondary hover:bg-secondary'
                        }`}
                 >
                     <span
-                        className={`absolute block h-5 w-5 rounded-full bg-white shadow-md transform transition-all duration-200 top-0.5 ${
-                            isChecked ? 'right-0.5 scale-110' : 'left-0.5'
+                        className={`absolute block h-5 w-5 rounded-full bg-text-primary transform transition-all duration-200 top-0.5 ${
+                            isChecked ? 'right-0.5' : 'left-0.5'
                         }`}/>
                 </label>
             </div>