Refactor and enhance document and recipe import functionality

- Removed the QuickImport module and service to streamline the codebase.
- Introduced DocumentImport module, service, and controller for handling PDF uploads and conversions to Markdown.
- Added PdfParser for parsing PDF files and extracting text.
- Implemented DocumentParser as an abstract class for future document parsers.
- Created a new GenericRecipeParser and IcaRecipeParser for handling recipe data from various sources.
- Developed QuickImportService to manage recipe scraping from URLs.
- Enhanced error handling and validation for file uploads and input processing.
- Updated project documentation with a structured plan for future development and improvements.

backend/src/app.module.ts

@@ -1,12 +1,12 @@
 import { Module } from '@nestjs/common';
-import { QuickImportModule } from './quick-import/quick-import.module';
+import { WebScrapingModule } from './web-scraping-service/web-scraping.module';
 import { RecipesModule } from './recipes/recipes.module';
-import { DocumentImportModule } from './document-import/document-import.module';
+import { DocumentServiceModule } from './document-service/document-service.module';
 
 @Module({
   imports: [
-    DocumentImportModule,
-    QuickImportModule,
+    DocumentServiceModule,
+    WebScrapingModule,
     RecipesModule,
   ],
 })

backend/src/document-service/controllers/document-import.controller.ts

@@ -6,7 +6,7 @@ import {
   BadRequestException,
 } from '@nestjs/common';
 import { FileInterceptor } from '@nestjs/platform-express';
-import { DocumentImportService, DocumentImportResult } from './document-import.service';
+import { DocumentImportService, DocumentImportResult } from '../services/document-import.service';
 
 @Controller('api/document-import')
 export class DocumentImportController {

backend/src/document-service/services/document-service.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { DocumentImportController } from './controllers/document-import.controller';
+import { DocumentImportService } from './services/document-import.service';
+
+@Module({
+  controllers: [DocumentImportController],
+  providers: [DocumentImportService],
+})
+export class DocumentServiceModule {}

backend/src/web-scraping-service/controllers/quick-import.controller.ts

@@ -1,5 +1,5 @@
 import { Controller, Post, Body } from '@nestjs/common';
-import { QuickImportService, QuickImportResult } from './quick-import.service';
+import { QuickImportService, QuickImportResult } from '../services/quick-import.service';
 
 @Controller('quick-import')
 export class QuickImportController {

backend/src/web-scraping-service/services/web-scraping.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { QuickImportController } from './controllers/quick-import.controller';
+import { QuickImportService } from './services/quick-import.service';
+
+@Module({
+  controllers: [QuickImportController],
+  providers: [QuickImportService],
+})
+export class WebScrapingModule {}