Upgrade to Yarn 4.0.2

Unlike previous attempts to do future-Yarn, this seemed to just mostly
go swimmingly, idk why! (I moved to a new computer and installed new
Yarn without really thinking, and hey nice!)

There was an issue where it was trying to do some glob expansion in
one of the arguments for the `build` script, fixed! (Idk why Yarn has
its own glob expansion and different from previous versions, but ok!)

.yarnrc.yml

@@ -0,0 +1 @@
+nodeLinker: node-modules

package.json

@@ -39,7 +39,7 @@
     "typescript": "^5.2.2"
   },
   "scripts": {
-    "build": "esbuild app/javascript/*.* --bundle --sourcemap --outdir=app/assets/builds --public-path=/assets --asset-names=[name]-[hash].digested --loader:.js=jsx --loader:.png=file --loader:.svg=file --loader:.min.js=text",
+    "build": "esbuild app/javascript/*.* --bundle --sourcemap --outdir=app/assets/builds --public-path=/assets --asset-names='[name]-[hash].digested' --loader:.js=jsx --loader:.png=file --loader:.svg=file --loader:.min.js=text",
     "build:dev": "yarn build --public-path=/dev-assets",
     "dev": "yarn build:dev --watch",
     "lint": "eslint app/javascript",