reorganize List from enum to struct; separate features to children mods

src/list/item.rs

@@ -0,0 +1,19 @@
+use log::debug;
+
+#[derive(PartialEq, Eq, Hash)]
+pub enum Item {
+    Ending(String),
+    Exact(String),
+}
+
+impl Item {
+    pub fn from_line(rule: &str) -> Self {
+        if let Some(item) = rule.strip_prefix(".") {
+            debug!("Add `{rule}` to the whitelist");
+            Self::Ending(item.to_string())
+        } else {
+            debug!("Add `{rule}` exact match to the whitelist");
+            Self::Exact(rule.to_string())
+        }
+    }
+}