ci(release): auto-release esign and template-builder on stable push

Add stable branch trigger so these packages publish @latest when
stable receives changes, matching superdoc/cli/sdk behavior.

Author: caio-pizzol

.github/workflows/release-esign.yml

@@ -1,11 +1,11 @@
-# Auto-releases on push to main (@next channel)
-# For stable (@latest): cherry-pick commits to stable branch, then manually dispatch this workflow
+# Auto-releases on push to main (@next) or stable (@latest)
 name: 📦 Release esign
 
 on:
   push:
     branches:
       - main
+      - stable
     paths:
       - 'packages/esign/**'
       - 'packages/superdoc/**'

.github/workflows/release-template-builder.yml

@@ -1,11 +1,11 @@
-# Auto-releases on push to main (@next channel)
-# For stable (@latest): cherry-pick commits to stable branch, then manually dispatch this workflow
+# Auto-releases on push to main (@next) or stable (@latest)
 name: 📦 Release template-builder
 
 on:
   push:
     branches:
       - main
+      - stable
     paths:
       - 'packages/template-builder/**'
       - 'packages/superdoc/**'