Automate dist update in dependabot PRs (#437)

- Automate workflow to build package and add changes to PR.
- Only runs on PRs started by user dependabot[bot].

Author: AnHeuermann

.github/workflows/patch-dependabot.yml

@@ -0,0 +1,44 @@
+name: Update dist on Dependabot PRs
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+    branches: [main]
+
+jobs:
+  build-and-commit:
+    if: github.actor == 'dependabot[bot]'
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build package
+        run: npm run package
+
+      - name: Commit dist changes
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add dist
+          if git diff --cached --quiet; then
+            echo "No changes to commit."
+          else
+            git commit -m "Update dist after Dependabot update"
+            git push
+          fi

README.md

@@ -138,7 +138,8 @@ Not available.
 
 ## Known Limitations
 
-This action is very slow, especially on Windows, see issue [#36][issue-36-link].
+This action can be slow, especially on Windows, see issue [#36][issue-36-link].
+
 - Macos runners are not supported, because OpenModelica discontinued the Mac
   builds after version 1.16. It should be possible to build/install latest
   OpenModelica nightly for macOS, see [this README][macos-readme]:.
@@ -151,8 +152,8 @@ The tests will install all sorts of OpenModelica versions and tools. To prevent
 the installer from messing with your host system use the provided dockerfile or
 dev-container:
 
-  - Linux: [.devcontainer/devcontainer.json](.devcontainer/devcontainer.json)
-  - Windows: [.ci/dockerfile](.ci/dockerfile)
+- Linux: [.devcontainer/devcontainer.json](.devcontainer/devcontainer.json)
+- Windows: [.ci/dockerfile](.ci/dockerfile)
 
 To build and test run: