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/WorldContext.ts

@@ -1,4 +1,4 @@
-import {WorldProps} from "@/lib/models/World";
+import {WorldProps} from "@/lib/types/world";
 import {createContext, Dispatch, SetStateAction} from "react";
 
 export interface WorldContextProps {
@@ -8,4 +8,10 @@ export interface WorldContextProps {
     isSeriesMode?: boolean;
 }
 
-export const WorldContext = createContext<WorldContextProps>({} as WorldContextProps);
+export const WorldContext = createContext<WorldContextProps>({
+    worlds: [],
+    setWorlds: (): void => {
+    },
+    selectedWorldIndex: 0,
+    isSeriesMode: false,
+});