chore: migrate from Dependabot to Renovate

Author: jjolton-contentful

.github/dependabot.yml

@@ -0,0 +1,16 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["local>contentful/renovate-config"],
+  "npm": {
+    "enabled": true
+  },
+  "packageRules": [
+    {
+      "matchDepTypes": ["dependencies", "peerDependencies", "optionalDependencies"],
+      "enabled": false
+    }
+  ],
+  "registryAliases": {
+    "npm.pkg.github.com": "https://npm.pkg.github.com"
+  }
+}