Add workflow for generating PDFs

The workflow generates PDFs using LaTeX with texlive-base, pygments and
other dependency.It creates a release on push events, uploading
concurrency-primer.pdf as a release for easy accessibility.

.github/workflows/main.yml

@@ -0,0 +1,42 @@
+name: generate-pdf-actions
+on: [push]
+jobs:
+ concurrency-primer:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      continue-on-error: true
+    - name: install-texlive
+      run: | 
+        sudo apt-get install -q -y texlive-full texlive-latex-base
+      shell: bash
+    - uses: actions/setup-python@v5
+      with:
+          python-version: '3.10' 
+    - name: install-pygments
+      run: |
+        python -m pip install --upgrade pip
+        pip install pygments
+    - name: make
+      run: make
+    - name: create Release
+      id: create_Release
+      uses: actions/create-release@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} 
+      with:
+        tag_name: ${{ github.ref_name }}
+        release_name: Release ${{ github.ref_name }}
+        body: |
+          Changes in this Release
+    - name: Upload Release Asset
+      id: upload-release-asset 
+      uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ steps.create_release.outputs.upload_url }} 
+        asset_path: ./concurrency-primer.pdf
+        asset_name: concurrency-primer.pdf
+        asset_content_type:  application/pdf 
+