DOC: Improve the register_index_accessor Documentation

[achapkowski]

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/reference/api/pandas.api.extensions.register_index_accessor.html#pandas.api.extensions.register_index_accessor

Documentation problem

There is no example showing how to create or what is required on the class to make an index accessor.

Suggested fix for documentation

Add a link to an example or expand the topic to include a how to implement this. Also document what is required to make a custom indexer.

[AnkitKashyap0709]

Hey, I've started recently on open-source contributions. And I want to help in contributing to the library pandas. I see already that no one is assigned here. I would like to get started on this.

[achapkowski]

@AnkitKashyap0709 go for it

[mohit-marathe]

Hey, I'm new to open-source contributions and I want this to be my one of the first contributions. Can I work on this?

[vishallb]

take

[pranav-ravuri]

Hi @vishallb what's the status on this issue? Can I take this issue, I am interested

[ShreyashThengne]

take