v3: consider replacing .Opts(Struct) with per-option builder methods in CRUD requests

[bigbes]

Currently, CRUD operations in the crud module accept optional parameters via a single .Opts(...) call that takes a large struct (e.g. ReplaceObjectManyOpts). This approach has a few drawbacks:

• It forces users to construct a full struct even when only one option is needed (especially if user uses exhaustruct linter).
• It is less discoverable.
• It makes call sites more verbose and less fluent compared to method chaining.

Proposal is to replace the .Opts(...) pattern with individual builder methods for each optional field:

req := crud.MakeReplaceObjectManyRequest("my_space").
    Objects(myObjects).
    Timeout(5.0).
    Fields("id", "name").
    StopOnError(true)

This style aligns better with common Go API design patterns and improves usability, especially for newcomers and interactive development.

Checklist

• Refactor all CRUD request types (InsertObjectMany, ReplaceObjectMany, etc.).
• Introduce typed setter methods for each field in the corresponding *Opts structs.
• Update tests and examples.
• Modify CHANGELOG.md and MIGRATION.md accordingly