feature: Alternating background in rendered table rows

Is your feature request related to a problem? Please describe.

I'm loving the plugin overall and the only missing part for me is that table rows are a little hard to visually parse for me

Describe the solution you'd like

I know that adding horizontal lines between rows is not acceptable https://github.com/MeanderingProgrammer/render-markdown.nvim/issues/295 but as an alternative I'd like to propose ability to set alternating background color for the table rows.

I'd be willing to try to implement this feature with minimal guidance where should I look in the code.

Describe alternatives you've considered

currently I'm rendering the markdown in the browser when looking into the tables which is not ideal ;)

Additional information

No response

まず、表の行のレンダリングを担っているコードと、表に関する既存の設定またはハイライト処理を見つけます。行の位置によってその背景を決定する方法を確認し、関連するテストを特定します。ユーザーが水平線を追加せずに交互の行背景を設定できれば完了です。