ci: add job to update lockfile

Author: shyim

.github/renovate.json

@@ -2,7 +2,6 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": ["config:recommended"],
   "schedule": ["before 9am on monday"],
-  "lockFileMaintenance": { "enabled": true },
   "commitMessagePrefix": "fix(deps): ",
   "packageRules": [
     {

.github/workflows/update-lockfile.yml

@@ -0,0 +1,44 @@
+name: Update Lockfile
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - '**/package.json'
+
+permissions:
+  contents: write
+
+jobs:
+  update-lockfile:
+    name: Update Lockfile
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install Dependencies
+        run: bun install
+
+      - name: Check for changes
+        id: changes
+        run: |
+          if git diff --quiet; then
+            echo "has_changes=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "has_changes=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Commit and push
+        if: steps.changes.outputs.has_changes == 'true'
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add bun.lock
+          git commit -m "chore: update lockfile"
+          git push