Add GitHub workflows

.github/workflows/build_pr_documentation.yml

@@ -0,0 +1,20 @@
+name: Build PR Documentation
+
+on:
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    uses: huggingface/doc-builder/.github/workflows/build_pr_documentation.yml@main
+    with:
+      commit_sha: ${{ github.event.pull_request.head.sha }}
+      pr_number: ${{ github.event.number }}
+      package: deep-rl-class
+      path_to_docs: deep-rl-class/units/
+      additional_args: --not_python_module
+      languages: en
+      hub_base_path: https://moon-ci-docs.huggingface.co