feat: add bun/npm support (#50)

Adding support for bun/npm.
1. Groups minor & patch updates together
2. Groups Bun version and docker version updates together.

Reviewed-on: #50
Co-authored-by: Timo Behrendt <t.behrendt@t00n.de>
Co-committed-by: Timo Behrendt <t.behrendt@t00n.de>

bun-npm.json

@@ -0,0 +1,19 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["local>t.behrendt/renovate-configs:common"],
+  "packageRules": [
+    {
+      "description": "Group all minor and patch updates together",
+      "groupName": "all non-major dependencies",
+      "groupSlug": "all-minor-patch",
+      "matchUpdateTypes": ["minor", "patch"],
+      "matchManagers": ["npm", "bun"]
+    },
+    {
+      "description": "Group Bun version and Docker version updates together",
+      "groupName": "bun version",
+      "groupSlug": "bun-version",
+      "matchPackageNames": ["Bun", "oven/bun"]
+    }
+  ]
+}