Add unified build and test workflow; remove legacy Linux workflow

Author: mfisher31

.github/workflows/build.yml

@@ -0,0 +1,87 @@
+name: Build and Test
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+
+jobs:
+  build-and-test:
+    strategy:
+      matrix:
+        os: [ ubuntu-22.04, macos-latest, windows-latest ]
+      fail-fast: false
+    
+    runs-on: ${{ matrix.os }}
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    
+    - name: Install dependencies (Linux)
+      if: runner.os == 'Linux'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y \
+          build-essential \
+          cmake \
+          ninja-build \
+          libasound2-dev \
+          libjack-jackd2-dev \
+          ladspa-sdk \
+          libcurl4-openssl-dev \
+          libfontconfig1-dev \
+          libfreetype6-dev \
+          libx11-dev \
+          libxcomposite-dev \
+          libxcursor-dev \
+          libxext-dev \
+          libxinerama-dev \
+          libxrandr-dev \
+          libxrender-dev \
+          libglu1-mesa-dev \
+          mesa-common-dev
+    
+    - name: Install dependencies (macOS)
+      if: runner.os == 'macOS'
+      run: |
+        brew install cmake ninja
+
+    - name: Install dependencies (Windows)
+      if: runner.os == 'Windows'
+      run: |
+        choco install cmake ninja -y
+    
+    - name: Setup MSVC environment (Windows)
+      if: runner.os == 'Windows'
+      uses: ilammy/msvc-dev-cmd@v1
+      arch: x64
+    
+    - name: Configure CMake (Windows)
+      if: runner.os == 'Windows'
+      run: |
+        cmake -B build -G Ninja -A x64 `
+          -DCMAKE_C_COMPILER=cl `
+          -DCMAKE_CXX_COMPILER=cl `
+          -DCMAKE_BUILD_TYPE=Release
+    
+    - name: Configure CMake (macOS)
+      if: runner.os == 'macOS'
+      run: cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
+
+    - name: Configure CMake (Linux)
+      if: runner.os == 'Linux'
+      run: cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
+    
+    - name: Build
+      run: cmake --build build --config Release
+    
+    - name: Run tests
+      run: ctest --test-dir build --output-on-failure
+
+    - name: Installer
+      run: cmake --build build --target installer --config Release