Groups form fields under a labeled heading.
Renders as a <fieldset> with <legend> in the form builder.
Supports visible_when for conditional section visibility.
Summary
Types
@type t() :: %PhoenixFilament.Form.Section{ items: [PhoenixFilament.Field.t() | PhoenixFilament.Form.Columns.t()], label: String.t(), visible_when: {atom(), atom(), any()} | nil }