feat(swc): sets filename property, so to make additional swc features… (

#1761)

feat(swc): sets filename property, so to make additional swc features available

Background: When using the swc rollup plugin in vitest, debugging will not work. I assume this comes from the filename property not being set, as the documentation states:
```
The filename is optional, but not all of Swc's
functionality is available when the filename is unknown, because a subset of options rely on the filename for their functionality.
```

Setting a filename should not have any side effects, just make debugging and other features work.

packages/swc/src/module.ts

@@ -37,7 +37,8 @@ export function swc(input: Options = {}): Plugin {
 
       return transform(code, {
         ...swcOptions,
-        sourceMaps: true
+        sourceMaps: true,
+        filename: id
       });
     }
   };