Improve README.md: clarify process, fix typos, and enhance formatting

[Ritesh17-stack]

Description

This pull request improves the README.md by fixing typos, clarifying the writing process, enhancing formatting, and adding a table of contents. The changes make the documentation more readable and user-friendly for new contributors and writers.
Fixes # (issue)

[github-actions]

Thank you and congratulations 🎉 for opening your very first pull request in writers-program

[pratik-mahalle]

Hey @Ritesh17-stack, Thanks for raising this pr.
Unfortunately, this PR doesn’t include any meaningful changes, typos and breaking links are supposed or just content changes are to be reported not fixed. You can do so on the specific two repositories that we provided. In the future, please ensure that a PR in this repo is raised only if you’ve made substantial updates or solved a particular issue. This helps keep the process efficient and organized.
This being a part of an assignment in api fellowship would be counted since you were supposed to create a pr but wont be merged since this is not that relevant of a change. I’m sure you understand, and I appreciate your cooperation on this. We will be closing this PR for now.

[amaan-bhati]

Hey @Ritesh17-stack thanks for raising this pr, the readme has already been updated with respect to the current rules of the writers program, hence we'll be closing this pr.