feat: Implement quick import feature for recipes

- Added QuickImportController and QuickImportService to handle recipe imports from URLs and file paths.
- Created QuickImportModule to encapsulate the quick import functionality.
- Developed frontend ImportFilePage for users to upload files or enter URLs for recipe import.
- Integrated API proxy to communicate with the backend for quick import requests.
- Implemented WriteRecipePage for users to manually input recipes with Markdown support.
- Added page routing for the new import and write recipe functionalities.

backend/src/quick-import/quick-import.controller.ts

@@ -0,0 +1,14 @@
+import { Controller, Post, Body } from '@nestjs/common';
+import { QuickImportService } from './quick-import.service';
+
+@Controller('quick-import')
+export class QuickImportController {
+  constructor(private readonly quickImportService: QuickImportService) {}
+
+  @Post()
+  async importFromInput(
+    @Body() body: { input: string }
+  ) {
+    return this.quickImportService.importFromInput(body.input);
+  }
+}