Programmatically generate feature graphic

Also use Noto as font for languages not supported by Lexend Deca and
move the text slightly futher down for better looks in CJK languages

.github/workflows/generate-feature-graphic.yml

@@ -0,0 +1,60 @@
+name: Generate feature graphic
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'fastlane/**'
+jobs:
+  generate-feature-graphic:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install requirements
+      run: |
+        sudo apt-get update
+        sudo apt-get install optipng
+        # Install 200 weight versions of relevant Noto (to use for languages not supported by Lexend Deca)
+        sudo apt-get install fonts-noto-extra fonts-noto-cjk-extra
+        # Custom fonts
+        mkdir "$HOME/.fonts"
+        find .scripts/generate_feature_graphic/fonts -name '*.ttf' -exec cp {} "$HOME/.fonts" \;
+        fc-cache
+    - name: Generate featureGraphic.png for each language
+      run: |
+        for lang in fastlane/metadata/android/*; do
+          pushd "$lang"
+          # Place temporary copy for editing if needed
+          cp ../../../../.scripts/generate_feature_graphic/featureGraphic.svg featureGraphic.svg
+          # Extract text after 'Catima - '
+          export subtext="$(grep -oP '(?<=Catima \S ).*' title.txt || true)"
+          # If there is subtext, change the .svg accordingly
+          if [ -n "$subtext" ]; then
+            perl -pi -e 's/Loyalty Card Wallet/$ENV{subtext}/' featureGraphic.svg
+            # Set correct font for language if needed (Lexend Deca has limited support)
+            # We specifically need the Serif version because of the 200 weight
+            case "$(basename "$lang")" in
+              bg|el-GR|ru-RU|uk) sed -i "s/Lexend Deca/Noto Serif/" featureGraphic.svg ;;
+              ja-JP) sed -i "s/Lexend Deca/Noto Serif CJK JP/" featureGraphic.svg ;;
+              ko) sed -i "s/Lexend Deca/Noto Serif CJK KR/" featureGraphic.svg ;;
+              zh-CN) sed -i "s/Lexend Deca/Noto Serif CJK SC/" featureGraphic.svg ;;
+              zh-TW) sed -i "s/Lexend Deca/Noto Serif CJK TC/" featureGraphic.svg ;;
+              *) ;;
+            esac
+          fi
+          # Ensure images directory exists
+          mkdir -p images
+          # Generate .png
+          convert featureGraphic.svg images/featureGraphic.png
+          # Optimize .png
+          optipng images/featureGraphic.png
+          # Remove temporary .svg
+          rm featureGraphic.svg
+          popd
+        done
+    - name: Create Pull Request
+      uses: peter-evans/create-pull-request@v3
+      with:
+        title: "Update feature graphic"
+        commit-message: "Update feature graphic"
+        branch-suffix: timestamp