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

先找出負責呈現表格列的程式碼，以及表格現有的設定或反白處理。確認如何根據列的位置決定其背景，並找出任何相關測試。當使用者可以設定交替的列背景，而不必新增水平線時，就算完成。