Enhance release workflow with submodule support

Added workflow_call with GH_PAT secret for private repo access and updated checkout step to fetch submodules.

Author: wp-fuse

.github/workflows/release.yml

@@ -8,6 +8,11 @@ on:
       - '**/*.php'
       - '.github/workflows/release.yml'
   workflow_dispatch:
+  workflow_call:
+    secrets:
+      GH_PAT:
+        description: 'Token de permissão para ler repositórios limitados/privados (como submódulos)'
+        required: false
 
 permissions:
   contents: write
@@ -21,6 +26,8 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          submodules: recursive # Obriga o Github Actions a baixar os submódulos da vez!
+          token: ${{ secrets.GH_PAT || github.token }}
 
       - name: Read plugin version
         id: version