FEAT: Implement groupby nth

[codingl2k1]

Is your feature request related to a problem? Please describe

A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

https://pandas.pydata.org/docs/reference/api/pandas.core.groupby.DataFrameGroupBy.nth.html

Describe the solution you'd like

A clear and concise description of what you want to happen.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

Add any other context or screenshots about the feature request here.

[Abhijeet1520]

Hello, if no one else is working on it then can I take over this issue?

[aresnow1]

Hello, if no one else is working on it then can I take over this issue?

Sure, you can reply take and issue will be assigned to you.