This adds a new Sri Lanka localization package with core accounting setup and statutory reports, including balance sheet, profit and loss, VAT, and withholding tax reporting. Businesses operating in Sri Lanka can use Odoo with more country-specific accounts, taxes, fiscal positions, and report templates out of the box.

Adds basic reporting module for Sri Lanka, including:
- Balance sheet
- Profit & loss

task-4352802

retargetted from master #93586