config: add client-rule infrastructure

src/criteria/clm/clm_matchers.rs

@@ -0,0 +1,19 @@
+#[expect(unused_macros)]
+macro_rules! fixed_root_criterion {
+    ($ty:ty, $field:ident) => {
+        impl crate::criteria::crit_graph::CritFixedRootCriterionBase<Rc<crate::client::Client>>
+            for $ty
+        {
+            fn constant(&self) -> bool {
+                self.0
+            }
+
+            fn not<'a>(
+                &self,
+                mgr: &'a crate::criteria::clm::ClMatcherManager,
+            ) -> &'a crate::criteria::FixedRootMatcher<Rc<crate::client::Client>, Self> {
+                &mgr.$field
+            }
+        }
+    };
+}