Create structure for statistics cookies.

src/parser/statistics_cookie.rs

@@ -0,0 +1,13 @@
+use super::Context;
+use crate::error::Res;
+use crate::parser::util::not_yet_implemented;
+use crate::parser::StatisticsCookie;
+
+#[tracing::instrument(ret, level = "debug")]
+pub fn statistics_cookie<'r, 's>(
+    context: Context<'r, 's>,
+    input: &'s str,
+) -> Res<&'s str, StatisticsCookie<'s>> {
+    not_yet_implemented()?;
+    todo!()
+}