Add GitHub Actions for prerelease and release automation

Author: Geenz

.github/workflows/prerelease.yml

@@ -0,0 +1,58 @@
+name: Pre-release
+
+on:
+  workflow_run:
+    workflows: ["CI"]
+    types:
+      - completed
+    branches:
+      - main
+
+permissions:
+  contents: write
+
+jobs:
+  create-prerelease:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Get commit info
+      id: commit
+      run: |
+        echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+        echo "date=$(date +'%Y%m%d-%H%M%S')" >> $GITHUB_OUTPUT
+        echo "commit_msg=$(git log -1 --pretty=%B | head -n 1)" >> $GITHUB_OUTPUT
+
+    - name: Delete existing pre-release
+      run: |
+        gh release delete latest --yes || true
+        git push origin :refs/tags/latest || true
+      env:
+        GH_TOKEN: ${{ github.token }}
+
+    - name: Create pre-release
+      uses: softprops/action-gh-release@v2
+      with:
+        tag_name: latest
+        name: "Development Build (latest)"
+        body: |
+          ## 🚀 Automated Development Build
+
+          **This is an automatic pre-release from the latest main branch.**
+
+          - **Commit**: ${{ steps.commit.outputs.sha_short }}
+          - **Date**: ${{ steps.commit.outputs.date }}
+          - **Message**: ${{ steps.commit.outputs.commit_msg }}
+
+          ### ⚠️ Warning
+          This is a development build and may be unstable. For production use, please use a [stable release](https://github.com/${{ github.repository }}/releases).
+
+          ### 📋 Recent Changes
+          See [commit history](https://github.com/${{ github.repository }}/commits/main) for details.
+        prerelease: true
+        make_latest: false

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+permissions:
+  contents: write
+
+jobs:
+  create-release:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Verify tag format
+      run: |
+        if [[ ! "${{ github.ref_name }}" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+          echo "Error: Tag must be in format v*.*.* (e.g., v1.0.0)"
+          exit 1
+        fi
+
+    - name: Extract version info
+      id: version
+      run: |
+        VERSION="${{ github.ref_name }}"
+        echo "version=${VERSION}" >> $GITHUB_OUTPUT
+        echo "version_number=${VERSION#v}" >> $GITHUB_OUTPUT
+
+    - name: Generate release notes
+      id: notes
+      run: |
+        # Get the previous tag
+        PREV_TAG=$(git describe --tags --abbrev=0 ${{ github.ref_name }}^ 2>/dev/null || echo "")
+
+        if [ -z "$PREV_TAG" ]; then
+          echo "This is the first release"
+          CHANGELOG=$(git log --pretty=format:"- %s (%h)" ${{ github.ref_name }})
+        else
+          echo "Changes since $PREV_TAG"
+          CHANGELOG=$(git log --pretty=format:"- %s (%h)" ${PREV_TAG}..${{ github.ref_name }})
+        fi
+
+        # Save to file to handle multiline
+        cat > release_notes.md << 'EOF'
+        ## 📦 Release ${{ steps.version.outputs.version }}
+
+        ### Changes in this release
+
+        $CHANGELOG
+
+        ### 🔧 Building from Source
+
+        ```bash
+        # Clone the repository
+        git clone https://github.com/${{ github.repository }}.git
+        cd EntropyCore
+        git checkout ${{ github.ref_name }}
+
+        # Basic build (minimal dependencies)
+        cmake -B build -S .
+        cmake --build build
+
+        # With Tracy profiler
+        cmake -B build -S . -DENTROPY_WITH_TRACY=ON -DVCPKG_MANIFEST_FEATURES=tracy
+
+        # With tests
+        cmake -B build -S . -DENTROPY_BUILD_TESTS=ON -DVCPKG_MANIFEST_FEATURES=tests
+        ```
+
+        ### 📚 Documentation
+
+        See [README.md](https://github.com/${{ github.repository }}/blob/${{ github.ref_name }}/README.md) for complete documentation.
+
+        ### 🐛 Reporting Issues
+
+        Found a bug? [Open an issue](https://github.com/${{ github.repository }}/issues/new)
+        EOF
+
+    - name: Create Release
+      uses: softprops/action-gh-release@v2
+      with:
+        name: "Release ${{ steps.version.outputs.version }}"
+        body_path: release_notes.md
+        draft: false
+        prerelease: false
+        make_latest: true
+        generate_release_notes: true
+
+    - name: Announce release
+      run: |
+        echo "✅ Release ${{ steps.version.outputs.version }} created successfully!"
+        echo "🔗 View at: https://github.com/${{ github.repository }}/releases/tag/${{ github.ref_name }}"