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/edit-attachments-page.ts

@@ -44,7 +44,11 @@ worker.onmessage = function (e) {
   const data = e.data;
 
   if (data.status === 'success' && data.attachments !== undefined) {
-    pageState.allAttachments = data.attachments.map(function (att: any) {
+    pageState.allAttachments = data.attachments.map(function (att: {
+      data: ArrayBuffer;
+      filename: string;
+      description: string;
+    }) {
       return {
         ...att,
         data: new Uint8Array(att.data),