Backported OpenMage#1600: removed M1 legacy themes (OpenMage#2863)

Author: fballiano

.github/workflows/release.yml

@@ -26,6 +26,10 @@ jobs:
         key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
         restore-keys: ${{ runner.os }}-composer-
 
+    - name: Require legacy frontend themes on v19
+      if: startsWith(github.event.release.tag_name, 'v19')
+      run: composer require --no-install --prefer-dist --no-progress --ignore-platform-req=ext-* openmage/legacy-frontend-themes
+
     - name: Require Mage_Backup on v19
       if: startsWith(github.event.release.tag_name, 'v19')
       run: composer require --no-install --prefer-dist --no-progress --ignore-platform-req=ext-* openmage/module-mage-backup

README.md

@@ -189,6 +189,7 @@ Most important changes will be listed here, all other changes since `19.4.0` can
 _If you rely on those modules you can reinstall them with composer:_
 - `Mage_Backup`: `composer require openmage/module-mage-backup`
 - `Mage_PageCache`: `composer require openmage/module-mage-pagecache`
+- `Legacy frontend themes`: `composer require openmage/legacy-frontend-themes`
 
 ### Between OpenMage 19.4.18 / 20.0.16 and 19.4.19 / 20.0.17