[16.0] [ADD] web_font_size_report_layout

[syci]

Odoo’s default report layout uses a fixed font size for all PDF documents. In many real use cases, especially when invoice or sales order lines include long product descriptions or detailed content, this results in documents that are difficult to read or excessively long.

This module introduces a configurable font size in the Document Layout settings. Administrators can choose between 9pt, 10pt, 12pt, and 14pt to optimize readability and space usage, adapting reports to company needs (compactness vs. visibility).

[OCA-git-bot]

This PR has the approved label and has been created more than 5 days ago. It should therefore be ready to merge by a maintainer (or a PSC member if the concerned addon has no declared maintainer). 🤖