DOC: Improve flow of '10 minutes to pandas' by adding an intro to the Merge section

[Saikrishna-dev-oss]

Pandas version checks

• I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

https://pandas.pydata.org/docs/user_guide/10min.html#merge

Documentation problem

When I am going through 10 min pandas guide I noticed something that feels like a gap in the "Merge" section.
Right now, the "Merge" header acts only as a title, but the content immediately jumps into "Concat". For a beginner will expect an pd.merge example to understand the sections namesake. Instead, I had to scroll through "Concat" and "Join" before finding an actual merge operation.

Suggested fix for documentation

I would like to propose adding one or two sentences explaining that "Merge" is a category for several operations (Concat, Join, and Merge) would make the flow easier to understand and adding a simple, self-contained pd.merge example directly under the "Merge" header, before the "Concat" sub-section starts.

[sanrishi]

@Saikrishna-dev-oss Thanks for reporting !
I think we should shift the merge section below the Merge heading i am working on this.

[Saikrishna-dev-oss]

"Hi @sanrishi , thanks! Actually, I’ve already implemented this locally on my machine.. I was just waiting for a maintainer to triage the issue before opening the PR. I’ll be submitting the PR shortly to resolve this."

[sanrishi]

Thanks @Saikrishna-dev-oss
Since I already opened the issue, I wanted to take a crack at fixing it myself and just pushed the PR. I appreciate the offer to help, though !

[Saikrishna-dev-oss]

Hey @sanrishi, thanks for the update.
No worries though, I’ll take a look at your changes and share feedback.