Add doc-builder doc-pr-upload GH Action (#411)

* Add doc-builder GH Actions

* Add minimum required doc files

* Revert "Add minimum required doc files"

This reverts commit e4838ac.

* Revert adding doc build GH Actions

Author: albertvillanova

.github/workflows/doc-pr-upload.yml

@@ -0,0 +1,16 @@
+name: Upload PR Documentation
+
+on:
+  workflow_run:
+    workflows: ["Build PR Documentation"]
+    types:
+      - completed
+
+jobs:
+  build:
+    uses: huggingface/doc-builder/.github/workflows/upload_pr_documentation.yml@main
+    with:
+      package_name: lighteval
+    secrets:
+      hf_token: ${{ secrets.HF_DOC_BUILD_PUSH }}
+      comment_bot_token: ${{ secrets.COMMENT_BOT_TOKEN }}