File content tool output.
Normalizes to an input_file map via Codex.ToolOutput.normalize/1.
input_file
Codex.ToolOutput.normalize/1
@type t() :: %Codex.ToolOutput.FileContent{ data: String.t() | nil, file_id: String.t() | nil, filename: String.t() | nil, mime_type: String.t() | nil, url: String.t() | nil }