Add first draft of workflow for creating translations PR

Author: steppi

.github/workflows/auto-translations-pr.yml

@@ -32,13 +32,19 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           cd numpy.org
-          ../automations/scripts/create_branch_for_language.sh numpy main l10n_main ${{ github.event.inputs.language_code }}
+          branch_name=$(../automations/scripts/create_branch_for_language.sh numpy main l10n_main ${{ github.event.inputs.language_code }})
+          echo "BRANCH_NAME=$branch_name" >> $GITHUB_ENV
         working-directory: ./numpy.org
 
-        - name: Create Pull Request
-          if: env.CONTENT_CHANGED == 'true'
-          env:
-            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          run:
-            gh pr create --base main --head ${{ env.BRANCH_NAME }} --title "Update translations for X" --body "Body goes here."
-          working-directory: ./numpy.org
+      - name: Create Pull Request
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          language_name=$(../automations/scripts/get_language_name.sh ${{ github.event.inputs.language_code }})
+          gh pr create --base main --head ${{ env.BRANCH_NAME }} --title "Update translations for $language_name" \
+          --body "This PR to update translations for $language_name was generated by the GitHub workflow, \
+          `auto-translations-pr.yml` and includes all commits from this repo's Crowdin branch for the language \
+          of interest. A final check of the rendered docs is needed to identify if there are any formatting \
+          errors due to incorrect string segmentation by Crowdin. If there are such formatting errors, they \
+          should be fixed directly on this branch, not through Crowdin.")
+        working-directory: ./numpy.org