Add/csv import options (#420)

* feat(import): add customer and supplier parsing functionality

- Implemented customer file parsing in `lib/import/customers/parser.ts` with support for Excel and CSV formats.
- Created types for detected customer columns and parsed customer rows in `lib/import/customers/types.ts`.
- Added tests for customer classification logic in `lib/import/shared/__tests__/classify.test.ts`.
- Developed classification functions for customers and suppliers in `lib/import/shared/classify.ts`.
- Introduced shared column utility functions in `lib/import/shared/column-utils.ts`.
- Implemented supplier file parsing in `lib/import/suppliers/parser.ts` with validation for various fields.
- Created types for detected supplier columns and parsed supplier rows in `lib/import/suppliers/types.ts`.
- Added tests for supplier column detection and parsing in `lib/import/suppliers/__tests__/column-detector.test.ts` and `lib/import/suppliers/__tests__/parser.test.ts`.

* fix(labels): update 'Svenskt företag' to 'Svenskt företag eller organisation' for clarity

* feat(import): refactor encoding handling for Swedish files and add tests for character preservation

* feat(recapt): implement clearRecaptIdentity function and integrate into logout flow

* feat(bookkeeping): implement copy functionality and next voucher sequence retrieval

* feat(import): enhance customer and supplier import functionality with normalization and event handling

types/recapt.d.ts

@@ -2,9 +2,21 @@ type RecaptFeedbackPayload =
   | { message: string; rating?: number }
   | { widget: 'show' | 'hide' | 'open' | 'close'; position?: string }
 
+type RecaptIdentifyPayload = {
+  uid: string | undefined
+  email?: string
+  nickname?: string
+}
+
+interface RecaptFn {
+  (action: 'feedback', data: RecaptFeedbackPayload): void
+  (action: 'identify', data: RecaptIdentifyPayload): void
+}
+
 declare global {
   interface Window {
-    recapt?: (action: 'feedback', data: RecaptFeedbackPayload) => void
+    Recapt?: unknown
+    recapt?: RecaptFn
   }
 }