Basic flow for macOS

(References: #42)

.github/workflows/build-macos.yml

@@ -0,0 +1,63 @@
+name: SUB - Build on macOS
+
+on:
+  workflow_dispatch:
+    inputs:
+      env:
+        description: "An Environment"
+        required: true
+        type: choice
+        options:
+          - development
+          - production
+      version:
+        description: "A Version"
+        required: true
+        type: string
+
+  workflow_call:
+    inputs:
+      env:
+        description: "An Environment"
+        required: true
+        type: string
+      version:
+        description: "A Version"
+        required: true
+        type: string
+
+jobs:
+  build:
+    runs-on: "macos-latest"
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-java@v3
+      with:
+        distribution: 'temurin'
+        java-version: '11'
+
+    - uses: krdlab/setup-haxe@v1
+      with:
+        haxe-version: 4.2.5
+
+    - uses: joshtynjala/setup-apache-flex-action@v2
+      with:
+        flex-version: "4.16.1"
+        air-version: "33.1"
+        accept-air-license: true
+
+    - name: Build with Ant      
+      run: >
+        ant 
+        -buildfile MoonshineSDKInstaller/build/build.xml all
+        -Dapp.version=${{ inputs.version }}
+        -Dbuild.is.signed=false 
+        -Dbuild.is.development=${{ inputs.env != 'production' }}
+
+    - name: Upload Artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: MoonshineSDKInstaller
+        path: MoonshineSDKInstaller/build/bin/MoonshineSDKInstaller-${{ inputs.version }}.pkg