feat(xatu): report unquoted URI literals

src/xatu/rules/unquoted_uri.rs

@@ -0,0 +1,19 @@
+use crate::{ast, rules::TokenRule};
+
+pub struct UnquotedUri;
+
+impl TokenRule for UnquotedUri {
+    type Token = String;
+
+    const ID: &'static str = "unquoted_uri";
+
+    fn select(data: &ast::TokenData) -> Option<&Self::Token> {
+        match data {
+            ast::TokenData::Uri(uri) => Some(uri),
+        }
+    }
+
+    fn check(_token: &Self::Token) -> Option<&'static str> {
+        Some("URI literals should be quoted")
+    }
+}