Add GitHub Actions release workflow for multi-platform builds

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: tucktuckg00se

.github/workflows/release.yml

@@ -0,0 +1,96 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Configure
+        run: cmake -B build -S project -DCMAKE_BUILD_TYPE=Release
+
+      - name: Build
+        run: cmake --build build --config Release
+
+      - name: Package
+        run: |
+          7z a INTERSECT-Windows.zip ./build/Intersect_artefacts/Release/VST3/INTERSECT.vst3 ./build/Intersect_artefacts/Release/Standalone/INTERSECT.exe
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: INTERSECT-Windows
+          path: INTERSECT-Windows.zip
+
+  build-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libasound2-dev libfreetype-dev libx11-dev libxrandr-dev libxcursor-dev libxinerama-dev libwebkit2gtk-4.1-dev libcurl4-openssl-dev
+
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Configure
+        run: cmake -B build -S project -DCMAKE_BUILD_TYPE=Release
+
+      - name: Build
+        run: cmake --build build --config Release
+
+      - name: Package
+        run: |
+          zip -r INTERSECT-Linux.zip build/Intersect_artefacts/Release/VST3/INTERSECT.vst3 build/Intersect_artefacts/Release/Standalone/INTERSECT
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: INTERSECT-Linux
+          path: INTERSECT-Linux.zip
+
+  build-macos:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Configure
+        run: cmake -B build -S project -DCMAKE_BUILD_TYPE=Release
+
+      - name: Build
+        run: cmake --build build --config Release
+
+      - name: Package
+        run: |
+          zip -r INTERSECT-macOS.zip build/Intersect_artefacts/Release/VST3/INTERSECT.vst3 build/Intersect_artefacts/Release/Standalone/INTERSECT.app build/Intersect_artefacts/Release/AU/INTERSECT.component
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: INTERSECT-macOS
+          path: INTERSECT-macOS.zip
+
+  release:
+    needs: [build-windows, build-linux, build-macos]
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: |
+            artifacts/INTERSECT-Windows/INTERSECT-Windows.zip
+            artifacts/INTERSECT-Linux/INTERSECT-Linux.zip
+            artifacts/INTERSECT-macOS/INTERSECT-macOS.zip