feat(search): add organizations facet support

[abulte]

Fix ecolabdata/ecospheres#1020

Adds organization_facet as a filter option for GlobalSearch, allowing downstream consumers to filter by organizations present in the current result set (facet-based), as opposed to the existing organization filter which queries all organizations via the suggestion API.

New OrganizationFacetFilter component renders organization_id_with_name facets (already returned by the API) as a radio group.

SearchFilterAliases maps UI-only filter keys to their API param equivalents (organization_facet → organization).

Usage:

getDefaultDatasetConfig({
  basicFilters: ['organization_facet'],
})

[abulte]

Reopening on origin and correct base PR.