Add GitHub Actions for CI/CD

.github/workflows/build.yml

@@ -0,0 +1,85 @@
+name: Build and Release PS3Dec
+
+on:
+  push:
+    branches: [ "main" ]
+    tags: [ "v*" ]
+  pull_request:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+            artifact_name: ps3decrs
+            asset_name: ps3dec-linux.tar.gz
+          - os: windows-latest
+            target: x86_64-pc-windows-msvc
+            artifact_name: ps3decrs.exe
+            asset_name: ps3dec-windows.zip
+          - os: macos-latest
+            target: x86_64-apple-darwin
+            artifact_name: ps3decrs
+            asset_name: ps3dec-macos.tar.gz
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Install Rust toolchain
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        targets: ${{ matrix.target }}
+
+    - name: Rust Cache
+      uses: swatinem/rust-cache@v2
+
+    - name: Build Release
+      run: cargo build --release --target ${{ matrix.target }}
+
+    - name: Package Artifacts (Windows)
+      if: matrix.os == 'windows-latest'
+      run: |
+        cd target/${{ matrix.target }}/release
+        tar -czf ../../../${{ matrix.asset_name }} ${{ matrix.artifact_name }}
+      shell: bash
+
+    - name: Package Artifacts (Linux / macOS)
+      if: matrix.os != 'windows-latest'
+      run: |
+        cd target/${{ matrix.target }}/release
+        tar -czf ../../../${{ matrix.asset_name }} ${{ matrix.artifact_name }}
+
+    - name: Upload Artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ matrix.asset_name }}
+        path: ${{ matrix.asset_name }}
+
+  release:
+    name: Create GitHub Release
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/v')
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+    - name: Download all artifacts
+      uses: actions/download-artifact@v4
+      with:
+        path: artifacts
+        merge-multiple: true
+
+    - name: Create Release and Upload Assets
+      uses: softprops/action-gh-release@v2
+      with:
+        files: artifacts/*
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}