the metadata parser

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>

crates/format/src/metadata.rs

@@ -0,0 +1,14 @@
+use std::collections::BTreeMap;
+
+use serde::Deserialize;
+
+use crate::{case::Case, mode::Mode};
+
+#[derive(Debug, Default, Deserialize, Clone, Eq, PartialEq)]
+pub struct Metadata {
+    pub cases: Vec<Case>,
+    pub contracts: Option<BTreeMap<String, String>>,
+    pub libraries: Option<BTreeMap<String, BTreeMap<String, String>>>,
+    pub ignore: Option<bool>,
+    pub modes: Option<Vec<Mode>>,
+}