Update workflow to build libwaku on all platforms

.github/workflows/ci-manual.yml

@@ -1,38 +1,42 @@
 name: On-demand multi-platform build
 
 on:
+  push:
+    branches:
+      - poc/logos-testnet-mix
   workflow_dispatch:
     inputs:
       ref:
         description: "Branch, tag, or commit SHA to build"
         required: true
         default: "master"
-      platform:
-        description: "Target platform"
-        required: true
-        type: choice
-        options:
-          - linux
-          - windows
-          - macos
 
 jobs:
   build:
-    runs-on: ${{ inputs.platform == 'linux' && 'ubuntu-latest' || inputs.platform == 'windows' && 'windows-latest' || 'macos-latest' }}
+    strategy:
+      matrix:
+        include:
+          - platform: linux
+            runner: ubuntu-latest
+          - platform: windows
+            runner: windows-latest
+          - platform: macos
+            runner: macos-latest
+    runs-on: ${{ matrix.runner }}
 
     steps:
       - name: Checkout requested ref
         uses: actions/checkout@v4
         with:
-          ref: ${{ inputs.ref }}
+          ref: ${{ inputs.ref || github.ref }}
 
       - name: Build libwaku
         run: |
-          echo "Building ref=${{ inputs.ref }} for platform=${{ inputs.platform }}"
+          echo "Building ref=${{ inputs.ref || github.ref }} for platform=${{ matrix.platform }}"
           make libwaku
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
-          name: libwaku-${{ inputs.platform }}
+          name: libwaku-${{ matrix.platform }}
           path: build/libwaku.*