feat(kernel): add Delegate syscall for capability delegation

crates/kernel/src/lib.rs

@@ -193,4 +193,19 @@ impl<P: Platform> Kernel<P> {
         }
         self.scheduler.remove(tid);
     }
+
+    #[cfg(test)]
+    pub fn create_endpoint_for_test(&mut self) -> types::id::EndpointId {
+        self.endpoints.create().expect("create endpoint")
+    }
+
+    #[cfg(test)]
+    pub fn grant_cap_for_test(
+        &mut self,
+        pid: ProcessId,
+        resource: Resource,
+        permissions: PermissionSet,
+    ) -> CapSlot {
+        self.grant_cap(pid, resource, permissions).expect("grant cap")
+    }
 }