Filter Institutions

Retrieve a list of institutions with optional filtering using the filter parameter. Supports attribute filters like cited_by_count, country_code, is_super_system, lineage, openalex, repositories.host_organization, repositories.host_organization_lineage, repositories.id, ror, summary_stats.2yr_mean_citedness, summary_stats.h_index, summary_stats.i10_index, type, works_count, x_concepts.id, and convenience filters like continent, default.search, display_name.search, has_ror, is_global_south.