List projects for an organization with pagination, filtering, and sorting.

Filter parameters support Supabase filter operators, per the field's declared policy:

• Text fields (name, description): use ilike.%value% for partial match
• Date fields: use gte.value, lte.value, etc.
• Date range: use created_at_gt and created_at_lt for between queries

There is no created_by_email filter: the projects table records no creator, so there is nothing to match against.