updated frontend builds (#5210)

* do not rely on node_modules path
* bump eslint to v9, run eslint via npm task, remove from build task
* loosen dependencies and update all packages
* rebuild assets with latest frontend packages
* bump webpack encore and dependencies
* bump to latest stable yarn
* explicitly mention dependencies

eslint.config.mjs

@@ -0,0 +1,22 @@
+import js from "@eslint/js";
+import globals from "globals";
+
+export default [
+    js.configs.recommended,
+    {
+        files: ["assets/js/**/*.js"],
+        ignores: ["assets/*.js"],
+        rules: {
+            eqeqeq: 1,
+            curly: "error",
+            semi: ["warn", "always"],
+        },
+        languageOptions: {
+            globals: {
+                ...globals.browser,
+                ...globals.node,
+                ...globals.amd,
+            }
+        }
+    },
+];