Add basic code for new testing format

tests/ef_tests/src/lib.rs

@@ -0,0 +1,30 @@
+use serde_derive::Deserialize;
+
+#[derive(Debug, Deserialize)]
+pub struct TestDoc<T> {
+    pub title: String,
+    pub summary: String,
+    pub forks_timeline: String,
+    pub forks: Vec<String>,
+    pub config: String,
+    pub runner: String,
+    pub handler: String,
+    pub test_cases: Vec<T>,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct SszGenericCase {
+    #[serde(alias = "type")]
+    pub type_name: String,
+    pub valid: bool,
+    pub value: String,
+    pub ssz: Option<String>,
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}