bug #899 [AssetMapper] Various minor tweaks (weaverryan)

This PR was squashed before being merged into the 2.x branch.

Discussion
----------

[AssetMapper] Various minor tweaks

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Tickets       | None
| License       | MIT

A few more tweaks as I'm testing things with the new recipe.

Commits
-------

f4e42e1 [AssetMapper] Various minor tweaks

Author: weaverryan

src/React/src/AssetMapper/ReactControllerLoaderAssetCompiler.php

@@ -72,6 +72,10 @@ private function findControllerAssets(AssetMapperInterface $assetMapper): array
             throw new \LogicException('The "symfony/finder" package is required to use ux-react with AssetMapper. Try running "composer require symfony/finder".');
         }
 
+        if (!file_exists($this->controllerPath)) {
+            return [];
+        }
+
         $finder = new Finder();
         $finder->in($this->controllerPath)
             ->files()

src/StimulusBundle/src/Twig/UxControllersTwigRuntime.php

@@ -26,6 +26,9 @@ public function __construct(
     ) {
     }
 
+    /**
+     * Returns the CSS <link> tags for all "autoimport" entries in controllers.json.
+     */
     public function renderLinkTags(): string
     {
         $controllersFile = $this->controllersMapGenerator->getControllersJsonPath();

src/Svelte/src/AssetMapper/SvelteControllerLoaderAssetCompiler.php

@@ -72,6 +72,10 @@ private function findControllerAssets(AssetMapperInterface $assetMapper): array
             throw new \LogicException('The "symfony/finder" package is required to use ux-Svelte with AssetMapper. Try running "composer require symfony/finder".');
         }
 
+        if (!file_exists($this->controllerPath)) {
+            return [];
+        }
+
         $finder = new Finder();
         $finder->in($this->controllerPath)
             ->files()

src/Vue/assets/package.json

@@ -16,7 +16,10 @@
         },
         "importmap": {
             "@hotwired/stimulus": "^3.0.0",
-            "vue/dist/vue.esm-bundler.js": "^3.0",
+            "vue": {
+                "package": "vue/dist/vue.esm-bundler.js",
+                "version": "^3.0"
+            },
             "@symfony/ux-vue": "path:dist/loader.js"
         }
     },

src/Vue/src/AssetMapper/VueControllerLoaderAssetCompiler.php

@@ -72,6 +72,10 @@ private function findControllerAssets(AssetMapperInterface $assetMapper): array
             throw new \LogicException('The "symfony/finder" package is required to use ux-Vue with AssetMapper. Try running "composer require symfony/finder".');
         }
 
+        if (!file_exists($this->controllerPath)) {
+            return [];
+        }
+
         $finder = new Finder();
         $finder->in($this->controllerPath)
             ->files()