feat(web): add OCR service and update travel reimbursement view

- web/src/services/ocr.js: add OCR service API client
- web/src/views/scripts/TravelReimbursementCreateView.js: update travel form script with OCR integration

web/src/services/ocr.js

@@ -0,0 +1,14 @@
+import { apiRequest } from './api.js'
+
+export function recognizeOcrFiles(files) {
+  const formData = new FormData()
+  for (const file of files) {
+    formData.append('files', file)
+  }
+
+  return apiRequest('/ocr/recognize', {
+    method: 'POST',
+    body: formData,
+    contentType: null
+  })
+}