Spreadsheet users can now create funnel charts from Odoo data, making it easier to visualize staged business flows such as pipelines or conversion steps. This improves reporting options directly in Documents Spreadsheet and Spreadsheet Edition without requiring external tools.

This commit adds the funnel chart type for odoo data.

Task: [4629660](https://www.odoo.com/web#id=4629660&cids=1&menu_id=4720&action=333&active_id=2328&model=project.task&view_type=form)