Refactor and enhance type safety across various modules

- Updated function parameters and return types in `page-preview.ts`, `pdf-decrypt.ts`, and `pymupdf-loader.ts` for improved type safety.
- Introduced type definitions for `CpdfInstance`, `PyMuPDFInstance`, and other related types to ensure better type checking.
- Enhanced error handling in `sanitize.ts` by creating a utility function for error messages.
- Removed unnecessary type assertions and improved type inference in `editor.ts`, `serialization.ts`, and `tools.test.ts`.
- Added type definitions for markdown-it plugins to improve compatibility and type safety.
- Enforced stricter TypeScript settings by enabling `noImplicitAny` in `tsconfig.json`.
- Cleaned up test files by refining type assertions and ensuring consistency in type usage.

src/js/logic/repair-pdf.ts

@@ -8,11 +8,12 @@ import { state } from '../state.js';
 import JSZip from 'jszip';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
+import type { QpdfInstanceExtended } from '@/types';
 
 export async function repairPdfFile(file: File): Promise<Uint8Array | null> {
   const inputPath = '/input.pdf';
   const outputPath = '/repaired_form.pdf';
-  let qpdf: any;
+  let qpdf: QpdfInstanceExtended;
 
   try {
     qpdf = await initializeQpdf();