Update the docs to highlight better how the plugin works and where things are done.

Quick Access link: https://github.com/Codeinwp/tweet-old-post/blob/chore/docs/docs/rop.md

Changes:

• Add the shape of the rop_data saved structure in the database. The shape of the saved structure can hardly be determined just from the code since the options are not all in one place. Also, this will offer a better understanding of the project through AI tools like Github Copilot Chat, which can read entire files.
• Mention of the changes made for X/Twitter in recent weeks.
• Small clarification on workflow and where things are located and used.