chore: Update CI workflow with versioning and publishing steps

.github/workflows/ci.yml

@@ -42,3 +42,58 @@ jobs:
         run: mix test
       - name: Check formatting
         run: mix format --check-formatted
+
+      - name: Calculate semantic version
+        id: versioning
+        uses: bitshifted/git-auto-semver@v1.1.0
+        with:
+          main_branch: main
+          create_tag: false
+          tag_prefix: 'v'
+
+      - name: Update version in mix.exs
+        env:
+          RELEASE_VERSION: ${{ steps.versioning.outputs.version-string }}
+        run: |
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+          git config --global user.name "github-actions[bot]"
+          sed -i "s/version: \".*\"/version: \"${RELEASE_VERSION#v}\"/" mix.exs
+          git add mix.exs
+          git commit -m "chore: Bump version to ${RELEASE_VERSION}"
+          git push
+
+      - name: Create GitHub Release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          VERSION=${{ steps.versioning.outputs.version-string }}
+          git tag $VERSION
+          git push origin $VERSION
+          gh release create $VERSION \
+            --title "Release $VERSION" \
+            --generate-notes
+
+  publish:
+    name: Publish to Hex.pm
+    needs: test
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main'
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: main  # Get the latest commit with version update
+
+      - name: Set up Elixir
+        uses: erlef/setup-beam@v1
+        with:
+          elixir-version: '1.16.2'
+          otp-version: '26.2.5'
+
+      - name: Install dependencies
+        run: mix deps.get
+
+      - name: Publish to Hex.pm
+        env:
+          HEX_API_KEY: ${{ secrets.HEX_API_KEY }}
+        run: mix hex.publish --yes