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.

context/SeriesContext.ts

@@ -2,10 +2,8 @@ import {Context, createContext} from "react";
 
 export interface SeriesContextProps {
     seriesId: string;
-    localSeries: boolean;
 }
 
 export const SeriesContext: Context<SeriesContextProps> = createContext<SeriesContextProps>({
-    seriesId: '',
-    localSeries: false
+    seriesId: ''
 });