Move @embroider/macros to peerDependencies (#1056)

* Move `@embroider/macros` to peerDependencies

* Add note in migrate docs

Author: mkszepp

docs/app/templates/public-pages/docs/migrate-8-0-to-9-0.gts

@@ -18,6 +18,15 @@ import { LinkTo } from '@ember/routing';
         <li><code>@glimmer/component</code> 2.x and above</li>
       </ul>
     </li>
+    <li>
+      <p>
+        <code>@embroider/macros</code>
+        is now a peer dependency. Please add it to your
+        <code>package.json</code>
+        as a
+        <code>devDependency</code>.
+      </p>
+    </li>
     <li>
       <p>
         Passing

package.json

@@ -58,7 +58,6 @@
   },
   "dependencies": {
     "@embroider/addon-shim": "^1.10.2",
-    "@embroider/macros": "^1.19.5",
     "decorator-transforms": "^2.3.0",
     "ember-element-helper": "^0.8.8",
     "ember-modifier": "^4.2.2",
@@ -117,6 +116,7 @@
     "vite": "^7.3.0"
   },
   "peerDependencies": {
+    "@embroider/macros": "^1.19.5",
     "@ember/test-helpers": "^5.0.0",
     "@glimmer/component": "^2.0.0"
   },