This pull request adds a new dashboard area with videos, sharing options, and clearer visual presentation to help users get started more easily. It also updates signup and planner-related screens so the dashboard works well across devices and fits better with the existing onboarding flow.

Task: https://www.odoo.com/web#id=10893&view_type=form&model=project.task&menu_id=3942&action=327
Pad: https://pad.odoo.com/p/r.llWYaF3PDnaqtssc

Adds a guided website planner to help users configure and improve their Odoo website, including reusable planning dialogs and website-specific steps. This makes website setup easier and more structured, with related enhancements for sales and event website flows.

- Task: https://www.odoo.com/web/#id=8892&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/r.QwqVIxpEC0lqa4WO