chore: improve console warning to distinguish between readonly and reactive

Author: chenfan0

packages/reactivity/src/reactive.ts

@@ -254,7 +254,11 @@ function createReactiveObject(
 ) {
   if (!isObject(target)) {
     if (__DEV__) {
-      console.warn(`value cannot be made reactive: ${String(target)}`)
+      console.warn(
+        `value cannot be made ${isReadonly ? 'readonly' : 'reactive'}: ${String(
+          target
+        )}`
+      )
     }
     return target
   }