Publishes spreadsheet-based dashboards for cooperative supermarkets
in Odoo's *Dashboards* menu, under a dedicated *Cooperative* group.

The dashboards consume the data prepared by ``pos_dashboard_cooperative``
(extended ``report.pos.order`` with member-at-date flag, category
hierarchy and time dimensions). They use Odoo's o-spreadsheet engine,
the same as Odoo Enterprise's official ``spreadsheet_dashboard_*``
modules.

Four dashboards ship out of the box:

* **POS Overview** — headline KPIs (Sales, Orders, Average ticket,
  Margin) and monthly evolution.
* **POS Members** — members vs non-members comparison, monthly
  evolution chart, TOP 50 buying members.
* **POS Categories** — members contribution KPIs and TOP 10 families,
  subfamilies and products.
* **POS Sales by Time** — sales by day of the week and hour of the
  day.

Each dashboard is a small hand-authored JSON file. They can be
redesigned visually inside o-spreadsheet (with ``spreadsheet_oca``
installed) and re-exported; see USAGE for the workflow.
