Grid layout. Fields: columns, rows, gutter, column_gutter, row_gutter, children.
columns
rows
gutter
column_gutter
row_gutter
children
@type t() :: %Folio.Content.Grid{ children: [Folio.Content.t()], column_gutter: String.t() | nil, columns: [String.t()] | nil, gutter: String.t() | nil, row_gutter: String.t() | nil, rows: [String.t()] | nil }