Standardize Node toolchain on v22

Add .nvmrc pointing at Node 22, raise the engines floor to >=22.13.0
(satisfies Vite 8 and ESLint 10 in one version), and bump @types/node
to ^22 so the types match the runtime.

Author: slaFFik

.nvmrc

@@ -0,0 +1 @@
+22

package-lock.json

@@ -29,7 +29,7 @@
     "test:sandbox": "tsx test/sandbox.spec.ts"
   },
   "engines": {
-    "node": "^20.19.0 || >=22.12.0"
+    "node": ">=22.13.0"
   },
   "dependencies": {
     "@radix-ui/react-tooltip": "^1.2.8",
@@ -42,7 +42,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
-    "@types/node": "^20.19.39",
+    "@types/node": "^22.19.17",
     "@types/proper-lockfile": "^4.1.4",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",