**Summary**
This PR introduces a new module that provides support for generating ISO 20022 payment files tailored for Swedish banks. It adds native support for domestic payment formats such as Bankgiro, Plusgiro, and BBAN, including structural validation and checksum logic. The module is designed to work in conjunction with Odoo's account_iso20022 and l10n_se.

**Features**

- Payment file generation

Generates ISO 20022-compliant XML files for Swedish banks

Supports Bankgiro, Plusgiro, and structured BBAN domestic accounts

- Payment batch splitting

Automatically separates domestic and foreign payments in the same batch

Produces one file per payment type (local/foreign), as required by banks

- Account type detection and validation

Auto-detects account type based on format and structure

**Validates using:**

Regex and Luhn for Bankgiro/Plusgiro

Mod10 and Mod11 algorithms for BBAN based on bank specification

Bank code validation via bank.code.range

- Bank code integrity checks

New model: bank.code.range

Defines allowed clearing number ranges per country

Prevents overlaps and out-of-bound values (e.g., SE: 1000–9999)

- Treasury settings

Lead time configuration for both domestic and international payments

Allows scheduling of payments after due date, enabling payment planning

- Views and configuration

Admin views for managing banks, clearing intervals, and payment behavior

System settings integrated via res.config.settings

- Localization and data

Includes translations (sv.po) and base POT

Preloads Swedish bank list and clearing number ranges from CSV

**Technical details**
Depends on: account_iso20022, l10n_se

Fully modular; integrates with existing payment batch and SEPA infrastructure

No overrides of core logic – all extensions via inheritance

Logging and warnings included for fallback cases (e.g. unparseable BBAN)

Enforces validation at both form level and compute level

**Example use case**
A Swedish company processing supplier payments uploads a single batch containing both Swedish and EU vendors. This module:

Detects Plusgiro and Bankgiro accounts

Validates BBAN using Mod10 or Mod11 based on bank rules

Applies company-defined lead times

Splits the payments into two ISO 20022 files: one for Swedish banks, one for cross-border SEPA