Attempt to clean up llm build spam

As it makes it hard to see if there are issues in the build when it's outputting a log for each file.

Author: mike-solomon

.github/workflows/pages.yml

@@ -38,7 +38,10 @@ jobs:
             ${{ runner.os }}-docusaurus-${{ hashFiles('**/package-lock.json', '**/yarn.lock') }}
 
       - name: Build website
-        run: yarn build
+        run: |
+          yarn build 2>&1 | tee build.log
+          MARKDOWN_COUNT=$(grep -c "Generated markdown file:" build.log || true)
+          echo "Generated $MARKDOWN_COUNT LLM markdown files" >> $GITHUB_STEP_SUMMARY
         env:
           NODE_OPTIONS: --max-old-space-size=8192
           DOCUSAURUS_IGNORE_SSG_WARNINGS: true