feat: Add Bloblang method and function reference partials (#402)

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-authored-by: Michele Cyran <michele@redpanda.com>
Co-authored-by: vbotbuildovich <62446873+vbotbuildovich@users.noreply.github.com>

Author: 4 people

.github/workflows/update-docs.yml

@@ -194,7 +194,8 @@ jobs:
             --fetch-connectors \
             --overrides "$DOCS_OVERRIDES" \
             --draft-missing \
-            --update-whats-new > full_output.txt 2>&1; then
+            --update-whats-new \
+            --include-bloblang > full_output.txt 2>&1; then
 
             echo "::error::Doc generation failed"
             cat full_output.txt