The zebra rows and the softer hover used to be shipped by
stock_picking_batch_custom, but its selector (`table.o_list_table`) carried no
module scope, so a warehouse addon was quietly restyling every list view in the
database. The scope was lost in 07bd632, while porting the selectors from Odoo
16 to 18.
The effect itself is wanted, so keep it and make it explicit: an asset-only
addon whose documented purpose is the global reach. Nothing depends on it, so
the striping can be turned off by uninstalling a single module.
An Odoo theme would not work here: `theme_*` addons only govern the website
frontend, and these rules live in `web.assets_backend`.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
