feat: sort imports using default Go (wip)

internal/imports/formatter.go

@@ -239,6 +239,20 @@ func (ft *Formatter) formatImports(
 		return nil, err
 	}
 
+	// Post process to sort imports using default Go
+	// TODO: find a way to use ast.SortImports without parse ast again
+	formattedASTFile, err := parser.ParseFile(fset, path, formattedBuffer.Bytes(), parserMode)
+	if err != nil {
+		return nil, fmt.Errorf("parser: failed to parse file [%s]: %w", path, err)
+	}
+
+	ast.SortImports(fset, formattedASTFile)
+
+	formattedBuffer.Reset()
+	if err := printer.Fprint(formattedBuffer, fset, astFile); err != nil {
+		return nil, err
+	}
+
 	return formattedBuffer.Bytes(), nil
 }