- Renamed LineItem interface to Item and adjusted properties accordingly.
- Updated CreateItemData and UpdateItemData interfaces to reflect new structure.
- Modified components to use the new Item interface, removing nested lines.
- Adjusted data binding in item configuration, main data, and other related components.
- Simplified item creation and editing logic by removing unnecessary nesting.
- Ensured all references to line items are updated to reflect the new structure.
- Implemented packages section for item details in `packages-section.svelte`
- Created summary section to display general data and weights in `summary-section.svelte`
- Developed tab continuation for additional item details in `tab-continuation.svelte`
- Added identifiers tab for managing item identifiers in `tab-identifiers.svelte`
- Introduced labeling tab for item labeling information in `tab-labeling.svelte`
- Created serial numbers tab for entering multiple serial numbers in `tab-series.svelte`
- Built item sheet for inventory items in `item-sheet-inv.svelte`
- Developed items tab form for managing invoice items in `items-tab-form.svelte`
- Implemented the items tab form in Svelte for editing invoices, displaying item quantities and import values.
- Created saveInvoice function to handle both creation and updating of invoices, including validation of required fields and building a unified payload for API requests.
- Added support for compliance, financials, and logistics data in the invoice payload.
