chore: migrate dependency updates from Dependabot to Renovate

.github/dependabot.yaml

@@ -1,10 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "npm"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-  - package-ecosystem: "npm"
-    directory: "/vite-lit-capacitor/electron"
-    schedule:
-      interval: "weekly"

renovate.json

@@ -0,0 +1,6 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ]
+}