adds action to convert images in PRs

.github/workflows/convertimages.yml

@@ -0,0 +1,44 @@
+name: Convert Images
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+  push:
+    branches:
+      - '*'
+
+permissions:
+  actions: read
+  checks: read
+  contents: read
+  deployments: none
+  issues: read
+  packages: none
+  pull-requests: read
+  repository-projects: none
+  security-events: none
+  statuses: none
+
+jobs:
+  build:
+    runs-on: 'ubuntu-latest'
+    name: Convert Images
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Dependencies
+        run: |
+          git clone --recursive https://github.com/kornelski/pngquant.git
+          cd pngquant
+          cargo build --release
+          cd ..
+
+          sudo add-apt-repository universe
+          sudo add-apt-repository ppa:inkscape.dev/stable
+          sudo apt-get update
+          sudo apt install inkscape
+
+          sudo apt install imagemagick
+        shell: bash
+      - name: Run convert images
+        run: ./convert.sh
+        shell: bash