Struct containing details about the webdriver session.
@type t() :: %Wallabidi.Session{ bidi_pid: pid() | nil, browsing_context: String.t() | nil, capabilities: map(), driver: module(), id: String.t(), metadata: term(), pid: pid() | nil, protocol: module() | nil, screenshots: list(), server: pid() | :none, session_url: String.t(), url: String.t() }