Boilerplate for SQL Bindings Extension (#18624)

* boilerplate for sql bindings extension

* edit gulpfile task as it was trying to find specific menus within package.json

build/lib/extensions.js

@@ -231,6 +231,7 @@ const externalExtensions = [
     'schema-compare',
     'server-report',
     'sql-assessment',
+    'sql-bindings',
     'sql-database-projects',
     'sql-migration'
 ];