Enhance Build_mR-NB.yml with workflow_dispatch

Add manual dispatch option with release flag to workflow

.github/workflows/Build_mR-NB.yml

@@ -3,7 +3,14 @@ on:
   push:
     branches:
       - v1.78.2-dev
-      
+
+  workflow_dispatch:
+    inputs:
+      release_flag:
+        description: 'Run NB release'
+        required: false
+        default: 'true'
+
 permissions:
   contents: write
   
@@ -19,6 +26,13 @@ jobs:
             platform: ARM64
             arch: arm64
     runs-on: ${{ matrix.runner }}
+    # Only run if:
+    # - manual dispatch, OR
+    # - push event AND commit message contains "NB release"
+    if: >
+      github.event_name == 'workflow_dispatch' ||
+      (github.event_name == 'push' && contains(github.event.head_commit.message, 'NB release'))
+
     steps:
       - name: (01) Checkout Repository
         uses: actions/checkout@v5