fix: support implements

[jycouet]

• with oxc parser, we get implements: [] and that was producing class Empty implements {}. Now checking the length as well.
• added a test case with multiple implements
• tweaked the end space.

[pkg-pr-new]

npm i https://pkg.pr.new/sveltejs/esrap@71

commit: bd522a4

[dummdidumm]

Thank you!