chore: add Renovate configuration for dependency management

Author: linuxdaemon

.github/dependabot.yml

@@ -0,0 +1,15 @@
+{
+    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+    "extends": [
+        "config:best-practices",
+        ":label(renovate)",
+        ":assignAndReview(linuxdaemon)",
+        ":configMigration",
+        ":separateMajorReleases",
+        ":separateMultipleMajorReleases",
+        ":separateMultipleMinorReleases",
+        ":separatePatchReleases",
+        "docker:pinDigests",
+        "helpers:pinGitHubActionDigests"
+    ]
+}