chore: 🛠️ add initial configuration for Renovate

* Introduced `renovate.json` to manage dependency updates.
* Extended configuration with recommended settings and GitHub Action digest pinning.

Author: okineadev

renovate.json

@@ -0,0 +1,4 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:recommended", "helpers:pinGitHubActionDigests"]
+}