[docs] Migrate docs from AsciiDoc to Markdown (#2635)

* delete asciidoc files

* add migrated files

* Apply suggestions from review

Co-authored-by: Josh Mock <josh@joshmock.com>

* Apply suggestions from review

Co-authored-by: Josh Mock <josh@joshmock.com>

* add the new ci checks (#2634)

---------

Co-authored-by: Marci W <333176+marciw@users.noreply.github.com>
Co-authored-by: Josh Mock <josh@joshmock.com>

.github/workflows/npm-publish.yml

@@ -23,38 +23,19 @@ jobs:
       - run: npm install -g npm
       - run: npm install
       - run: npm test
-      - name: npm publish
-        run: |
-          version=$(jq -r .version package.json)
-          tag_meta=$(echo "$version" | cut -s -d '-' -f2)
-          if [[ -z "$tag_meta" ]]; then
-            npm publish --provenance --access public
-          else
-            tag=$(echo "$tag_meta" | cut -d '.' -f1)
-            npm publish --provenance --access public --tag "$tag"
-          fi
+      - run: npm publish --provenance --access public --tag alpha
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
       - name: Publish version on GitHub
         run: |
           version=$(jq -r .version package.json)
-          tag_meta=$(echo "$version" | cut -s -d '-' -f2)
-          if [[ -z "$tag_meta" ]]; then
-            gh release create \
-              -n "[Changelog](https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/$BRANCH_NAME/changelog-client.html)"
-              --target "$BRANCH_NAME" \
-              --title "v$version" \
-              "v$version"
-          else
-            tag_main=$(echo "$version" | cut -d '-' -f1)
-            gh release create \
-              -n "This is a $tag_main pre-release. Changes may not be stable." \
-              --latest=false \
-              --prerelease \
-              --target "$BRANCH_NAME" \
-              --title "v$version" \
-              "v$version"
-          fi
+          gh release create \
+            -n "This is a 9.0.0 pre-release alpha. Changes may not be stable." \
+            --latest=false \
+            --prerelease \
+            --target "$BRANCH_NAME" \
+            --title "v$version" \
+            "v$version"
         env:
           BRANCH_NAME: ${{ github.event.inputs.branch }}
           GH_TOKEN: ${{ github.token }}