Import Wizard (#2130)

Flat File Importer

build/gulpfile.vscode.js

@@ -78,6 +78,7 @@ const sqlBuiltInExtensions = [
 	// Add SQL built-in extensions here.
 	// the extension will be excluded from SQLOps package and will have separate vsix packages
 	'agent',
+	'import',
 	'profiler'
 ];