implemente bulk update/import users to list

[jeroenrinzema]

No description provided.

[Copilot]

Pull request overview

This PR implements bulk user import functionality for static lists via CSV upload. The implementation includes CSV parsing with flexible column ordering, user upsert operations, and list membership management.

Key changes:

• Refactored UpsertUser to use a structured params object instead of individual parameters
• Changed users_count from optional to required field in the List schema
• Added CSV import endpoint for bulk adding users to lists

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
services/nexus/oapi/resources.yml	Made users_count a required field in List schema
services/nexus/oapi/resources_gen.go	Updated generated code to reflect required users_count field
services/nexus/internal/store/users.go	Refactored UpsertUser to accept structured UpsertUserParams
services/nexus/internal/store/users_test.go	Updated tests to use new UpsertUserParams structure
services/nexus/internal/store/lists.go	Added typed constants for list types/states and AddUserToList method
services/nexus/internal/importer/users.go	New CSV mapper for transforming CSV rows to user upsert parameters
services/nexus/internal/http/controllers/v1/users.go	Updated to use UpsertUserParams structure
services/nexus/internal/http/controllers/v1/lists.go	Added ImportListUsers endpoint with CSV processing
services/nexus/internal/http/controllers/v1/lists_test.go	Added comprehensive tests for CSV import functionality
services/nexus/internal/http/controllers/v1/controller.go	Wired up max upload size configuration for lists controller
services/nexus/internal/http/controllers/v1/test/users/*.csv	Test fixtures for CSV import scenarios
services/console/public/templates/users.csv	Updated template to match supported import fields